Furse Khereiji
Furse Khereiji
Earthing
           Earthing
           Introduction                                                            6/2
           Product selection guide                                                 6/4
    All components are designed to withstand mechanical                         Furse earthing and equipotential bonding products offer the
    damage and the thermal and electromechanical stresses from                  surest solution to this problem.
    the earth fault and leakage currents expected within an
    installation.                                                               From pipe clamps and metalwork bonds to connect to
                                                                                accessible metal parts, to low resistance copper conductor
    These components, combined together, form the earth                         and high quality earth rods for the earthing arrangement -
    termination system - the vital system for dispersing those                  Furse products are designed to perform.
    dangerous lightning and fault currents safely and effectively
    into the ground.                                                            And where our standard range doesn’t quite fit your
                                                                                requirements, with full design and manufacturing capability
    Following National & International standards, we recommend                  we can design a special component to suit.
    a single integrated earth termination system for a structure,
    combining lightning protection earthing with power and                      Special component design and manufacture
    telecommunication system earthing.                                          Our standard range is designed to meet the vast
                                                                                majority of earthing applications. However, on occasion,
    This integrated approach ensures all systems are                            you may have the need for a non-standard part, for example
    appropriately cross-bonded and earthed, to fully safeguard                  where connecting large copper cable or tape to a rod, or to
    against the risk of voltage differences which might otherwise               metalwork.
    give rise to flashover or electric shock.
                                                                                Where this is the case, our technical engineering team can
                                                                                design a special component to your needs, which on approval
                                                                                can be manufactured in the quantity specified for the project.
    Product selection guide - Earthing                                               In addition to the conductors, earth rods and plates or any
    No.        Type                                            Section / Page No.    combination thereof can be used to achieve an effective earth
    1.         Conductors                                                     3/1    depending on the site conditions.
    2.         Earth rods                                                      7/4
    3.         Earth plates                                                  7/10     2                      2. Earth rods
    4.         FurseWELD exothermic welding                                   9/2                            Earth rods take advantage of lower
    5.         Compression connectors                                        8/23                            resistivity soils at greater depths than
    6.         Mechanical clamps                                              8/2                            normal excavation will allow.
    7.         Earth inspection pits                                           7/9
    8.         Earth bars                                                    8/18                            3. Earth plates
    9.         Earth electrode backfills                                      7/11                           Earth plates are used to attain an effective
                                                                                      3
                                                                                                             earth in shallow soils with underlying rocks
                                                                                                             or in locations with large amounts of
                                                                                                             buried services. They can also provide
    Earthing                                                                                                 protection at potentially dangerous places
                                                                                                             e.g. HV switching positions.
6
    An effective earthing system is a fundamental requirement
    of any modern structure or system for operational and/or
                                                                                     Main aspects and individual components of an earthing system
    safety reasons. Without such a system, the safety of
    a structure, the equipment contained within it and its
    occupants are compromised.
    Earthing systems typically fall into (but are not limited to) one
    of the following categories:
    –– Power generation, transmission and distribution
    –– Lightning protection
    – – Control of undesirable static electricity
    – – Telecommunications
         1
                                1. Conductors                                                                                               4
                                We offer three types of conductor:
                                – Flat tape
                                                                                                                       5
                                – Solid circular
                                – Stranded cable
                                                                                                                                                    1
                                                                                     8
                                                                                                           8. Earth bars
                                                                                                           Earth bars are an efficient and
                                                                                                           convenient way of providing a common
                                            3
                                                                                                           earth point. Integral disconnecting
              1                                                                                            links mean the earth bars can be isolated
                         3                                                                                 for testing purposes.
                                                                                     9
                                                                                                           9. Earth electrode backfills
      7                                                                                                    Earth electrode backfills are to be used
                                                                                                           in areas where required resistance
      6
                                                                     1                                     levels are difficult to achieve. These
2
                                                                                                           products effectively act to increase the
                                                                                                           electrode’s surface area thus lowering its
                                                                                                           resistance to earth.
9 2
                   Earth electrodes
                   Introduction                                                             7/2
                   Earth rods
                   Threaded copperbond earth rod                                            7/4
                   Unthreaded copperbond earth rod                                          7/5
                   Solid copper & stainless steel earth rod                                 7/6
                   Earth rod seal                                                           7/7
                   Inspection pits
                   Lightweight inspection pit                                               7/9
                   Concrete inspection pit                                                  7/9
                   Backfill materials
                   FurseCEM® conductive aggregate                                          7/11
                   Bentonite moisture retaining clay                                       7/11
    Three types of Furse earth rod are available, but the copperbonded steel cored rod
    is by far the most popular, due to its combination of strength, corrosion resistance
    and comparatively low cost.
    Quality earth rods are commonly made from either solid                      Solid copper rod
    copper, stainless steel or copperbonded steel.                              Furse solid copper earth rods offer greater resistance to
                                                                                corrosion. They are ideally used in applications where soil
    Solid copper and stainless steel rods offer a very high level               conditions are very aggressive, such as soils with high salt
    of corrosion resistance at the expense of lower strength                    content.
    and higher cost.
                                                                                Stainless steel rod
    Copperbond rod                                                              Stainless steel rods are used to overcome many of the
    Furse copperbond earth rods probably offer to the installer                 problems caused by galvanic corrosion which can take place
    the best and most economical earth rods available. They are                 between dissimilar metals buried in close proximity. Furse
    made by molecularly bonding 99.9% pure electrolytic copper                  stainless steel earth rods are highly resistant to corrosion.
    on to a low carbon steel core. Furse rods are not of the
    sheathed type. They are highly resistant to corrosion, and
    because the steel used has a very high tensile strength, they
    can be driven by power hammers to great depths.
Thus the rationale is: Use the most economical rod that soil
conditions will allow you to drive. This is one of the ways to
ensure that you don’t waste money on over-dimensioned rods.
100%
                                                                                                                                                7
80%
60%
40%
0%
                                                                 Rod
                                                                 Diameter
        1/2”     3/4”     1”   11/4”   11/2”   13/4”   2”
                                           Fittings
                                                             Type		                                Weight
                                           Part no.          (”)		                                 (kg)
                                           CG170             1
                                                                 ⁄ 2 Coupling 		                   0.09
                        Rod                CG270             5
                                                                 ⁄ 8 Coupling 		                   0.08
                                           CG370             3
                                                                 ⁄4 Coupling 		                    0.13
                                           ST100             1
                                                                 ⁄ 2 Driving stud 		               0.05
                                           ST200             5
                                                                 ⁄ 8 Driving stud 		               0.08
                                           ST300             3
                                                                 ⁄4 Driving stud 		                0.12
Standards
    IEC/BS EN 62561-2
    BS 7430
                                  Fittings
                                  			 Weight each
                                  Part no. Type		 (kg)		
                                  CG177             12.7 mm Coupling 		                   0.09
                                  CG277             14.2 mm Coupling 		                   0.08
                                  CG377             17.2 mm Coupling 		                   0.13
                                  ST107             12.7 mm Driving head                  0.25
                                  ST207             14.2 mm Driving head                  0.22
                                  ST307             17.2 mm Driving head                  0.27
Standards
BS 7430
                                           Fittings
                                           								            Weight each
                                           Part no. Type							(kg)
                                           ST010              15 mm hardened steel driving stud for copper/stainless steel rod   0.02
                                           ST015              20 mm hardened steel driving stud for copper/stainless steel rod   0.05
                     Spike                 CG013              Coupling dowel for 15 mm & 20 mm copper rod 		                     0.02
                                           CG005              Coupling dowel for 16 mm & 20 mm stainless steel rod 		            0.02
                                           SP010              15 mm hardened steel spike for copper/stainless steel rod          0.02
                                           SP015              20 mm hardened steel spike for copper/stainless steel rod          0.04
    Standards
    BS EN 50164-2
    BS 7430
    UL467 (RC010-KIT,
    RC015-KIT,
    RS005-KIT)
                          Inspection pit
                                                                                                                             Earth rod seal pack
                          High performance
                                                                                                                          The earth rod seal pack
                          lightweight inspection pit.
                                                                                                                      comprises compression rings
                                                                                                                         & nitrile rubber ‘O’ rings.
                          Earth rod seal
                          Mates with the inspection pit
                          and seal tube.
                                                                                                                                 Membrane seal
                                                                                                                   Designed to create a watertight
                          Earth rod seal tube                                                                       seal between the damp proof
                          High impact ABS seal tube allows                                                          membrane and the seal tube.
                          the earth rod to pass directly
                          through the slab into the ground.
                                           Hammer rig
                                                                                   Weight each
                                           Part no.           Description          (kg)
                                           HM105              Hammer rig          196.35
                                           – By mounting a hammer onto a rig, longer lengths of earth rods can be driven. For projects where large quantities of rods are required
                                              cost savings can be achieved, for example, by using single 8 ft rods rather than 2 x 4 ft rods which would need couplers etc.
                                           – Installation time is also considerably reduced. Please specify length of rod to be driven and type of hammer to be used when ordering.
                                                                                                                                                                                        7
                                                              300 mm
                                                              256 mm
                                       54 mm
                                      158 mm
ø 200 mm Nominal
ø 70 mm
602   BS EN 60228
                Standards
                                                           320 mm
                BS EN 62561-5
0
                                    192 mm
146 mm
Topsoil
                 FurseCEM®
Standards        Concrete
                 Mix
BS EN 50164-7 Rock ,
                                                                                                                                                               7
                                    Sand,
                                    Shale,
                                     etc.
                 Earth Rod
                 Electrode
Topsoil
                 Moisture
                 Retaining
                 Clay
                                    Rock,
                                    Sand,
                                    Shale,
                                     etc.
                 Earth Rod
                 Electrode
UL467 (CR105)
UL 467 (CR305)
UL 467 (CR700,
CR705, CR730)
Rebar clamp
                                                              Conductor		
                                                              size      Rebar diameter                Conductor           Weight each
                                           Part no.           (mm)      (mm)                          material            (kg)
                                           BN150              Ø8                  Ø 8-18              Copper              0.32
                                           BN155              Ø8                  Ø 18-38             Copper              0.75
                                           – High strength copper alloy rebar clamp for bonding to reinforcing bars, steam pipes, handrails etc.
                                           – Tightening torque 15 Nm (BN155 - M10); 5 Nm (BN155 - M6)
Standards
BS 7430
    Earth points
8
    Furse earth points are available for direct connection to conductors, or with additional pre-welded tail (single or double 70 mm2
    PVC insulated cable) to enable connection to internal rebar arrangements via mechanical clamps (see product tables for
    individual product availability).
– Tightening torque 8 Nm
Standards
BS EN 50164-1 Class H
BS 7430
              Earth boss
                                 Length             Diameter            Thread		                              Weight each
              Part no.           (mm)               (mm)                size    Material                      (kg)
              EB0000             25                 Ø 25                M8                 Mild steel         0.11
              EB1000             25                 Ø 25                M8                 Stainless steel    0.11
              EB0110             30                 Ø 30                M8                 Mild steel         0.18
              EB1110             30                 Ø 30                M8                 Stainless steel    0.18
              EB0111             30                 Ø 30                M10                Mild steel         0.20
              EB1111             30                 Ø 30                M10                Stainless steel    0.20
              EB0120             30                 Ø 40                M8                 Mild steel         0.24
              EB1120             30                 Ø 40                M8                 Stainless steel    0.24
              EB0121             30                 Ø 40                M10                Mild steel         0.26
Standards     EB1121             30                 Ø 40                M10                Stainless steel    0.26
              EB0130             30                 Ø 50                M8                 Mild steel         0.29
BS 7430
              EB1130             30                 Ø 50                M8                 Stainless steel    0.29
              EB0131             30                 Ø 50                M10                Mild steel         0.31
              EB1131             30                 Ø 50                M10                Stainless steel    0.31
              EB0211             40                 Ø 30                M10                Mild steel         0.33
              EB1211             40                 Ø 30                M10                Stainless steel    0.33
              EB0212             40                 Ø 30                M12                Mild steel         0.36
              EB1212             40                 Ø 30                M12                Stainless steel    0.36
              EB0221             40                 Ø 40                M10                Mild steel         0.43
                                                                                                                                                      8
              EB1221             40                 Ø 40                M10                Stainless steel    0.43
              EB0222             40                 Ø 40                M12                Mild steel         0.45
              EB1222             40                 Ø 40                M12                Stainless steel    0.45
              EB0231             40                 Ø 50                M10                Mild steel         0.53
              EB1231             40                 Ø 50                M10                Stainless steel    0.53
              EB0232             40                 Ø 50                M12                Mild steel         0.55
              EB1232             40                 Ø 50                M12                Stainless steel    0.55
              EB0311             50                 Ø 30                M10                Mild steel         0.50
              EB1311             50                 Ø 30                M10                Stainless steel    0.50
              EB0312             50                 Ø 30                M12                Mild steel         0.52
              EB1312             50                 Ø 30                M12                Stainless steel    0.52
              EB0321             50                 Ø 40                M10                Mild steel         0.65
              EB1321             50                 Ø 40                M10                Stainless steel    0.65
              EB0322             50                 Ø 40                M12                Mild steel         0.67
              EB1322             50                 Ø 40                M12                Stainless steel    0.67
              EB001              50                 Ø 50                M10                Mild steel         0.80
              EB1331             50                 Ø 50                M10                Stainless steel    0.80
              EB0332             50                 Ø 50                M12                Mild steel         0.80
              EB1332             50                 Ø 50                M12                Stainless steel    0.80
              – E arth boss manufactured from mild steel (to 970 230M07 grade EN1A) or stainless steel (grade 316L) complete with stainless steel
                 studs, nuts and washers - grade 316. For welding to steel vessels, tanks, structures etc. Wrap connections with Denso tape
              Continuous
              5 mm Fillet Weld
Standards
    BS EN 62561-1 Class H
    BS 7430
                                           B bond
                                                              Maximum tape width 		                     Conductor    Weight each
                                           Part no.           (mm)                Bolt size             material     (kg)
                                           BN105              26                         M10            Copper       0.12
                                           BN005              26                         M10            Aluminium    0.06
                                           BN113              31                         M10            Copper       0.15
                                           BN114              40                         M10            Copper       0.18
                                           BN117              50                         M10            Copper       0.20
                                           – For bonding tape to steel structures
                                           – Tightening torque 17 Nm
Standards
                        Metalwork bond
                                           Conductor size          Conductor      Weight
                        Part no.           (mm)                    material       each (kg)
                        CS350              Ø8                      Copper         0.37
                        CS355              Ø8                      Aluminium      0.17
                        – For connecting to all types of metal structures up to 13 mm thickness
                        – Tightening torque - M8 bolt: 10 Nm, M10 bolt: 12 Nm
Standards
BS EN 62561-1 Class H
BS 7430
Standards
BS EN 62561-1 Class H
RWP bond
                                                              Maximum       		                                 Weight
                                                              tape width 		          Conductor                 each
                                           Part no.           (mm)         Bolt size material                  (kg)
                                           BN115              26                  M10              Copper      0.12
                                           BN010              26                  M10              Aluminium   0.07
                                           – For bonding tape to rainwater pipes, handrails etc.
Standards
BS 7430
Watermain bond
                                                              Maximum		                            Weight
                                                              tape width Conductor                 each
                                           Part no.           (mm)       material                  (kg)
                                           BN120              26                  Copper           0.26
                                           – For bonding tape to large diameter pipes
Standards
BS 7430
Pipe bond
Standards
BS EN 62561-1 Class H
BS 7430
                        Pipe clamp
                                           Pipe diameter       Pipe diameter      Conductor range Weight each
                        Part no.           (”)                 (mm)               (mm 2)          (kg)
                        3902               Ø 1⁄2 -1            Ø 13-25            25-95               0.3
                        3903               Ø 11⁄4 -2           Ø 32-50            25-95               0.4
                        3904               Ø 21⁄ 2 -3 1⁄2      Ø 65-90            25-95               0.5
                        3905-TB            Ø 4-5               Ø 100-125          25-95               0.6
                        3906-TB            Ø6                  Ø 150              25-95               0.8
                        3907               Ø8                  Ø 200              25-95               1.0
                        3908               Ø 10                Ø 250              25-95               1.1
                        3909-TB            Ø 12                Ø 300              25-95               1.5
Standards               – Copper alloy clamp with zinc plated U-bolt
BS 7430
A A
Length
A A
Length
                                           Eyebolt
                                                               Nominal copperbond rod diameter          Weight each
                                           Part no.            (”)		                                    (kg)
                                           BT150               5
                                                                   ⁄8		 0.52
                                           BT160               3
                                                                   ⁄4 		                                0.52
                                           – Screws direct onto a copperbond earth rod, offering an earth point for boats, trucks etc.
Standards
BS 7430
Standards
BS 7430
Standards
II 2 GD T6
Standards
II 2 GD T6
    Furse earth bars are an efficient and convenient way of                      – – Swan-Neck accessory, to facilitate the main earth bar
    providing a common earth point, and integral disconnecting                       connection
    links allow easy isolation for testing purposes.                             – – Available as bare copper or tinned copper hard drawn bar
8
    Standard Furse earth bars are available in a variety of lengths,             Special earth bar requirements
    but all consist of a 50 mm wide by 6 mm thick copper bar                     Standard earth bars meet the majority of applications,
    with M10 termination screws - standard product codes                         however where a customer has a specific requirement, we
    are provided.                                                                can design and manufacture special earth bars and
                                                                                 disconnecting links as appropriate. Special earth bar designs
    Standard features and benefits                                               are provided for customer review and approval as required
    –– The plastic channel base is entirely corrosion proof, made                before manufacture.
        from high impact uPVC unlike the traditional galvanized
        steel channel                                                            Special earth bar design variables include:
    –– Lighter and easier to handle, the use of a modern polymer                 – – Size and type of bolt, hex nut and washer
        channel has reduced the weight of the products, making                   – – Length, width and thickness of earth bar
        them easier to handle                                                    – – Number of disconnecting links, and their position
    – – Pre-drilled fixing holes for ease of installation                        – – Number of insulators
    –– A range of three designs to meet most installation requirements           – – Supplied with mounting base or without
An example of a customer special earth bar comprising M10 and M6 studs and disconnecting links
              Earth bar
                                                   Length              Weight each
              Part no.           Description       (mm)                (kg)
              Copper earth bar
              LK245-6            6 way             400                 1.80
              LK245-8            8 way             500                 2.20
              LK245-10           10 way            650                 2.80
              LK245-12           12 way            750                 3.20
              LK245-14           14 way            850                 3.60
              LK245-16           16 way            950                 4.00
              LK245-18           18 way            1050                4.40
Standards     LK245-20           20 way            1200                5.00
              LK245-22           22 way            1300                5.40
BS 7430
              LK245-24           24 way            1400                5.80
              LK245-26           26 way            1500                6.20
              LK245-28           28 way            1650                6.90
              LK245-30           30 way            1750                7.30
              Tinned copper earth bar
              LK245-6-T          6 way             400                 1.80
              LK245-8-T          8 way             500                 2.20
              LK245-10-T         10 way            650                 2.80
              LK245-12-T         12 way            750                 3.20
                                                                                                                                         8
              LK245-14-T         14 way            850                 3.60
              LK245-16-T         16 way            950                 4.00
              LK245-18-T         18 way            1050                4.40
              LK245-20-T         20 way            1200                5.00
              LK245-22-T         22 way            1300                5.40
              LK245-24-T         24 way            1400                5.80
              LK245-26-T         26 way            1500                6.20
              LK245-28-T         28 way            1650                6.90
              LK245-30-T         30 way            1750                7.30
              – Fix using countersunk wood screws 11⁄2” No. 12 (Part no. SW110) and wall plugs (Part no. PS310)
              – Standard width x height: 90 mm x 77 mm
                                              disconnecting link
    BS 7430
                                            Insulator
                                                                Height (A)              Top diameter (B) Max diameter (C) Insert             For copper bar size
                                            Part no.            (mm)                    (mm)             (mm)             size               (mm)
                                            Insulator
                                            IN020               20                      Ø 14             Ø 18             M6                 25 x 3
                                            IN030               30                      Ø 25             Ø 33             M6                 25 x 6
                                            IN040               40                      Ø 31             Ø 39             M8                 38 x 6
                                            IN013               50                      Ø 27             Ø 35             M10                50 x 6
8
                                            IN060               60                      Ø 38             Ø 52             M10                75 x 6
                                            IN070               70                      Ø 51             Ø 55             M12                100 x 6
                                            Insulator with 2 studs and 3 nuts
                                            IN005               50                      Ø 27             Ø 35             M10                50 x 6
                                            – Insulator manufactured from grey GRP material with brass insert
                                       Top                                        Max.
                                     diameter                                   diameter
                                        (B)   Top                                  (C) Max.
                                            diameter                                  diameter
                                               (B)                                       (C)
Height (A)
Height (A)
                                                                                                                                            8
              Hydraulic crimping head and pump
                                 			                                               Weight each
              Part no.           Description			                                    (kg)
              HT020              15 ton hydraulic tool with carrying case 		       5.5
              HT030              Foot operated hydraulic pump with carrying case   16.5
              – Self-contained hydraulic crimping tool used for jointing and terminating copper, aluminium and ACSR conductors
              – Crimping force 230 kN, maximum operating pressure 700 Bar
              – Hydraulic head complete with quick automatic coupler for connection to pump
              – Accepts most U-Type dies of equivalent tonnage
              – Pump supplied with 3 m long high pressure flexible hose
              – Each supplied with carrying case
              – Dies are not included