aited electrical contractors PER DU dey 7) ae ev eee) y j; Bae So Cee Rey deere se cies ‘ail " Bi 5United Electrical Contractors Earthing System Rod Earth electrode materials ‘volity corth rods are commonly made from either solid copper, stainless steel or copperbonded sto ‘We can supply al three types, bu he copperbonded ste! cored rod is by far the mos! popular, f due to its combination of strength, corrosion resistance, and comporatvey low cos Sold copper and stainless stel rods offer over high level of corrosion resistance at he expense of lower strength and higher cost Diameter of rod One common misconception is th! the diameter of the rod has a drastic effect on lowering earth resistance. This isnot true! As the graph shows, you only lower the resistance value by } 9.8 per cent by doubling the diameter of the rod (which means increasing the weight and the cost ofthe rod by opproximately 400 percent!) Thus the rationale is: Use the most economical ro thot soil condiions will allow you to drive. This s one ofthe ways to ensure thal you don't waste money on over-dimensioned rods Effect of electrode diometer on resistance Restance% A) | = Pt 0 rr Rod Diameter Thread and shank diameters Confusion often orises between thread and shank diameters for threaded rods. The thread rolling process, used by quality rod manufacturers, raises the surface of the rod 40 that thread diameter (8) is greater than shank diameter (A) (see drawing). All threads are Unified National Coarse (UNC-2A\. Threaded copperbond earth rods table eeeElectrical Contra Conductors Bare copper tape ‘Conductor Weight Siondord Pet no. size (Xx¥) per mate coil size 25 x3mm 067g 50m 1030 a oo High conductiviy copper tope to BS EN 13601 (formerly BS 1432) “S A S PVC covered copper tape Conductor size (XxY) Weight per metre Standard coil size Part no. 25 x3 077g 50m Tc 110 High conductivity copper tape to BS EN 13601 (formerly BS 1432), ‘ PVC colours to BS 5252. * SS ee Block. greon. gioy stone. white. brown . ow WS Bare stranded copper cable Soft drawn stranded copper cable to BS 6360 ‘Cross-sectional Siranding Weight Patino. Aveo: nnow/mm er metre Tome? 7.10 0.15kg e016 ? 35mm? 712.52 0.32kg, (C8035 50mm? 19/78 043k cB0s0-FU. Omen? 1972.14 0.82kg, 5070 95mm? 19/2.52 0.86K9 8095, 120mm 37/2.03 1.09kg 8120 240mm? 61/2.25 2.20kg 8240 Green & yellow PVC insulated stranded copper cable Cross-sectional Siang Weight Patino. ‘Aveo no./mm per metre Vémim? 7.10 0.19kg ccor6 35mm? 7252 Otkg cc035 50mm? 19/178 0.53kg cc050 70mm? 192.14 0.73kq cco70 95mm? 19/252 100kg cco9s 120mm? 3772.03 1L16kg cc120.FU 240mm? 61/225 2.4949 cc240 * Other products for grounding & lighining materials ore evoilable. To order contoct United Elecrical Conductors for details ee erynisms) cae aes ae Inspection Pits Lightweight inspection pit Description Weight each Part no. LighMeigh inspection pit with ory lid 1.80k9 1205 The lightweight inspection pl weighs only 18k yet s load oted 05,000 hos « lockable ld ond improved working area compored fo the concrete inspection pk An integra eath boris ovailable as an optional extra Manufactured from high-pefonance pohmer, he lighveight pil is UV stole and chemical reson Lightweight inspection pit with concrete lid a> Description Weight each Part no. Lightweight iepection pit with concrate id 7.50kq prio Concrete inspection pit “United” Dasciistich Weight each Part no. CConerole inspection pit 30k PTO0S Earth bars Earth bars and disconnecting links Earth bars Descrition Langjh” Width Height "Weight each Pat na, Bway 500mm 90mm 90mm 220k iK245-8 Earth bars with single disconnecting link Descristion Length” Width Height Weight each” Patino: Bway 575mm 90mm — 9mm —2.70kg 1K243-8 Electronic System Lightning sttkes between clouds or o ground (and objects upon i) con cause tronsien! over voltages to be coupled onto electrical cables, and hence into the sensitive electronic ‘equipment connected to them. To protect the elecronie equipment inside a building, = All cables that enter or leave the building must be protected. Cables leaving the building can also provide o route back into the building for transients For each bulding protect incoming / out going: * Mains power supplies (including UPS supplies) * Dota communication and local area network cables * Signal, control, instrumentation and alarm lines + CCT, solellte, TV and entenna cables + Telephone and telemetry lines. * Other products for grounding & lightning materiols are available. To order contoct United Electrical Conductors for details. aeons Cee eee aConnection Clamps Rod to tape clamp (type A) Nominal rod Mox Weight Diameter Max ~ conductor each aa" 26% 10mm 0.15 Rod to cable clamp (type G) Nominal rod Mai Weight Diometer conductor each 5/8" lémm 16-70mn? 0.064 3/4" 20mm 35:150ma 0.069 Rod to cable clamp (type GUV) Nominal vod Max Weight Diameter conductor each 3/4" 20mm 70-300mm 20.3%9 Square tape clamp (Canaueior Ss) Conductor material Weight each 253mm Copper 0.2kg For forming straight through, cross or tea jints in ope and ber, Square conductor clamp Conductor Size Conductor material Weight each CSTE CTT 0.2% For forming straight through, cross or ee joints in tope and bar FurseWELD Port no. cRIO5, Port no. cR515* R520" Paitin, R705 Paitin. cm105.FU,Accessories Four hole earth points Hole size Length Weight Part no. MB x 14mm 75mm Oikg eciio DC tape clip Conductor material Weight each Port no, Copper 064k CNIO5.H One hole cable clip Conductor Conducior Weight PRA Diometer material ‘each Customer requirement Copper O01kg cP915 Heavy duty cast cable saddle Conductor Conductor Weight Part no. Diameter material Customer requirement Copper 0.09kg cPB15 DC tape clip For use with bare coppar ‘Conductor Size Weight each Part no. 203mm 0.06kg cr205 253mm 007k cr2i0 25 x4mm 0.07k9 crais 25x 6mm 0.08k cr220 Non-metallic DC tape clip For use with bare tope ‘Conductor Colour Weight Part no. Site each 25 «3mm Brown .01kg crois Colors available brown, grey, green + Other products for grounding & lighining materials are ovallabe. To order contact United Electicel Conductors for details. ee Pe at(Unit Air rod Rod) length 500mm 100m 200mm 500mm 100mm 200mm Air Terminal Rod diameter 15mm 15mm 15mm 15mm 15mm 15mm Thread Material | diameter perrod Vémm Copper 16mm Copper Vémmm Copper 1émm Aluminio Vémm Aluminium 16mm Aluminiom Lightning Protection System Weight 0.73kg 1.5tkg 3.,00k9 0.29kg, 0.53k9 1.0649 Multiple point fod diameter Moteral each Weight I 15mm, Copper O.27kg Tape Base Rod Diometer 15mm Cable Base Thread diometer Vémnm Thieod diometer 16mm Suitable only for use with copper air terminals, Moterol Copper Material perrod ‘Copper ae 0.47kg Lea 1.03kg Fang) RAZIS A225 A240 RAOIS: A025 RAOAO Field ol ets inthe United States, carried out over many years research have confirmed tht blunt girrode ar sruck by ightning in preference fo toper ported oi rods, Part no. RAGOO | Patna. $0105 + Other products for grounding & lightning moterials are availabe, To erder contact United Electrical Conductors for details. Cente