Installation Instructions
OnTrac Cable Tray
Safety Information
Cutting Recommendations
WARNING:
DO NOT USE AS A WALKWAY, LADDER, OR SUPPORT FOR
PERSONNEL.
USE ONLY AS A MECHANICAL SUPPORT FOR CABLES, TUBING
AND RACEWAY.
Intended Use
Install this tray only in a restricted service environment, such as a data center. Use
indoors only, in environmentally controlled areas; do not use outdoors, or in harsh
environments. Allow only qualified service personnel to install or use this tray.
Use cable tray cutting tool P/N 34839-001 to cut tray wires. Use side
action bolt cutter to prevent sharp wires from protruding past the cut
intersection.
Angle cuts beyond cross wire (See Offset Cut image below).
Concentrate on making smooth, clean cuts to prevent sharp edges.
Cut bottom wires first, in the order shown below, starting the first cut at
1 and continuing in numerical order (see Bottom Cutting Order image).
Cut side wires next, starting at the top and working down (see Side
Cutting Order image).
Examine all cuts and smooth out any sharp edges.
Tools Required
Cable Tray Cutting Tool (P/N 34839-001)
7/16 Socket Wrench
Sand Paper (for removal of painted finish)
Recommended Tools:
Any tools needed for mounting the tray should be identified before installation.
A metal file may be used to chamfer rough edges after cutting tray.
Handheld rotary sanding tools speed up paint removal.
Marking tools for marking wire cut locations reduce mistakes and ease
planning.
Electric nut drivers reduce assembly time of fittings.
A plumb bob or laser level may be used to verify effectiveness of mounting
points.
A level may be used to check consistency of tray runs.
A vacuum may be useful for cleanup of metal and paint shavings.
Offset Cut
(Recommended)
Center Cut Blades are
NOT Recommended
3
1
2
1
3
Bottom Cutting Order
Side
1
5
1
Cutting
1
2
4
1
6
1
1
Order
IIS-734811, 01/06/10, Rev. 4, CPI/JJY/JLN
800-834-4969 (USA & Canada) www.chatsworth.com techsupport@chatsworth.com
For international phone numbers, see our website or contact CPI Tech Support.
This drawing contains proprietary and confidential information and is protected by U.S. and international law. Unauthorized
reproduction, disclosure or use of the drawing or the information therein is expressly forbidden except as agreed to in writing by
Chatsworth Products, Inc.
Page 1 of 8
Installation Instructions
OnTrac Cable Tray
End-to-End Splicing OPTION 1
Use Standard Splice Kit (P/N 34738-X01) to connect sections of wire mesh cable
tray together end-to-end, at intersections and turns
Refer to table below for the number of splices required to form an end-to-end
connection. Standard Splices Kits are sold in packs of 50 splices. Quantities listed
in table are for individual splices.
Use two splices (one per side) on the sides of the 2H (50 mm) tray and four
splices (two per side) on the sides of the 4H (100 mm) and 6H (150 mm) trays;
use the rest of the splices evenly spaced on the bottom of the tray.
The two halves of the splice wrap around adjacent wires on the tray connecting
the tray wires together.
Always install bolt heads on the inside of the tray to protect cables.
Electrical bonding of painted trays and connectors requires metal-to-metal contact
between tray wires and the splice. Remove paint where the splices contact the
trays.
Cable tray employing these splice methods is suitable for use as an equipment
grounding conductor.
Number of Standard Splices Required to Form an End-to-End Connection
Tray Width
Tray
Height
12
16
18
20
24
100 mm
150 mm
200 mm
300 mm
400 mm
450 mm
500 mm
600 mm
N/A
N/A
2
50 mm
4
100 mm
6
150 mm
Page 2 of 10
P/N 34738-X01: Standard Splice
Installation Instructions
OnTrac Cable Tray
End-to-End Splicing OPTION 2
Use Spring Splice Kit (P/N 34834-X01) to connect sections of wire mesh cable tray
together end-to-end.
Refer to table below for the number of splices required to form an end-to-end
connection. Spring Splice Kits are sold in packs of 50 splices. Quantities listed in
table are for individual splices.
Use two splices (one per side) on the sides of the 2H (50 mm) tray and up to four
splices (two per side) on the sides of the 4H (100 mm) and 6H (150 mm) trays;
use the rest of the splices evenly spaced on the bottom of the tray.
The splice wraps around adjacent wires on the tray connecting the tray wires
together.
Insert splice as shown and use installation tool to pull splice into place.
Ensure that the splice is installed with the middle tab facing in the tray and the flat
edges are facing away from the tray.
The tray will not be stable until splices are installed on both sides of the tray.
Electrical bonding of painted trays and connectors requires metal-to-metal contact
between tray wires and the splice. Remove paint anywhere the splices contact the
trays.
Cable tray employing these splice methods is suitable for use as an equipment
grounding conductor.
STEP 1: Insert Splice
STEP 2: Align Tool
Number of Spring Splices Required to Form an End-to-End Connection
Tray Width
Tray
Height
12
16
18
20
24
100 mm
150 mm
200 mm
300 mm
400 mm
450 mm
500 mm
600 mm
N/A
N/A
2
50 mm
4
100 mm
6
150 mm
Page 3 of 10
STEP 3: Lock splice into place
Installation Instructions
OnTrac Cable Tray
End-to-End Splicing OPTION 3
Recommended for all trays that are 18W (450 mm) or wider
Use Splice Bar (P/N 34739-X01) with Standard Splice Kits (P/N 34738-X01) to
create a more secure end-to-end connection between wire mesh cable tray
sections. Splice Bars replace Standard Splices used on side of tray.
Refer to table below for the number of Splice Bars required to form an end-to-end
connection. Splice Bars are sold in packs of 50. Quantities listed in table are for
individual splices.
Use two splice bars (one per side) on the sides of the 2H (50 mm) tray and four
splice bars (two per side) on the sides of the 4H (100 mm) and 6H (150 mm)
trays.
Splice Bar attaches to the side of the tray using three Splice Washer & Bolts (P/N
34728-X01); 1/4 hardware
Always install bolt heads on the inside of the tray to protect cables.
Electrical bonding of painted trays and connectors requires metal-to-metal contact
between tray wires and the splices. Remove paint where the splices contact the
trays and splice bars.
Cable tray employing these splice methods is suitable for use as an equipment
grounding conductor.
P/N 34728-X01:
Splice Washer & Bolt
Number of Splice Bars Required for an End-to-End Connection
Tray
Height
2
50 mm
4
100 mm
6
150 mm
Tray Width
12
16
18
20
24
300 mm
400 mm
450 mm
500 mm
600 mm
4
P/N 34739-X01: Splice Bar
Smooth 90 Turn
Page 4 of 10
Installation Instructions
OnTrac Cable Tray
Refer to the table below to determine how many tray sections will be required to
be cut from the tray for the turn (See images on right for detail).
Refer to table below for the number of hardware pieces required to form a smooth
90 turn. Splice Kit, Splice Bar and Splice Washer & Bolt Kit are sold in packs of
50. Quantities listed in this table are for individual splices/bars/washers.
Make one splice connection between each removed section. One connection is
made using a Splice Bar (P/N 34739-X01) and two Splice Washers & Bolts (P/N
34728-X01). The Splice Bar may be cut short with wire cutters for finished look.
The rest of the connections use Standard Splices (P/N 34738-X01).
Always install bolt heads on the inside of the tray to protect cables.
Electrical bonding of painted trays and connectors requires metal-to-metal contact
between tray wires and the splice. Remove paint where the splices contact the
trays.
Installing a ground conductor along fitting using P/N 34838-001 is required to
insure bonding across removed sections (See page 8 for details).
Cable tray employing these splice methods is suitable for use as an equipment
grounding conductor.
2H x 12W tray before bend
Smooth 90 Turn Forming Guide
Tray
Width
4
100 mm
6
150 mm
8
200 mm
12
300 mm
16
400 mm
18
450 mm
20
500 mm
24
600 mm
Standard
Splice Bolt
P/N 34738X01
Splice Bar
P/N 34739X01
Splice
Washer
and Bolt
P/N 34728X01
10
11
10
Removed
Sections
2H x 12W bent and spliced tray
P/N 34738-X01:
Standard Splice
Tight 90 Turn
Page 5 of 10
Installation Instructions
OnTrac Cable Tray
Refer to the table to the right to determine how many tray sections will be
required to be cut from the tray for the turn. Insure that the side wire cuts and the
mid-section cuts are always symmetric (See cutting detail on the next page).
Bend the tray 90 around the center of the cuts. Use the 90 Splice Bar
Kit (P/N 34740-X01) to secure the fitting together. One 90 Splice Bar
Kit comes with enough hardware for two turns (See 90 Splice Bar Kit
detail to the right).
Use the 90 Splice Bar with Splice Washers and Bolts to connect the
inside side edges together. Use the Clamp Washers and Carriage Bolt
to clamp the over lapping mesh together (See image below).
Always install bolt heads on the inside of the tray to protect cables.
Electrical bonding of painted trays and connectors requires metal-to-metal contact
between tray wires and the splice. Remove paint where the splices contact the
tray and 90 Splice Bar.
Installing a ground conductor along fitting using P/N 34838-001 is required to
insure bonding across removed sections (See page 8 for details).
Cable tray employing these splice methods is suitable for use as an equipment
grounding conductor.
P/N 34740-X01: 90 Splice Bar Kit
Tight 90 Turn Forming Guide
Tray
Width
x8
Splice Washer and Bolt
(Secures 90 Splice bar
to tray)
4
100 mm
6
150 mm
x2
Carriage Bolt
(Secures clamp
washers together)
200 mm
12
300 mm
16
x4
400 mm
18
Clamp Washer
(Clamps bottom tray
mesh together)
450 mm
20
500 mm
24
600 mm
x2
90 Splice Bar
(Secures inner side
edges of tray together)
Tight 90 Turn Cut Detail: Top View (2H x 12W Tray Shown)
Page 6 of 10
Removed
MidSections
Removed
Side
Sections
10
10
Installation Instructions
OnTrac Cable Tray
Bottom Wire
CUT SIDE WIRES (6 sections removed
shown): Cut to inside of cross wires and
inside of bottom wires (See ISO View).
Cross Wire
CUT MID-SECTION WIRES
(2 sections removed shown):
Cut to inside of cross wires
and directly under side wires
(See ISO View).
Side Wire
Ensure mid section cut is in center
of side wire cut and not offset.
T-Intersections and Crosses
Terminating Tray
Page 7 of 10
ISO View
Installation Instructions
OnTrac Cable Tray
T-Intersection
Insure that the side wire cuts are wider than the width of the intersecting tray (See
Continuous Tray cutting detail below).
Use the 90 Splice Bar Kit (P/N 34740-X01) to secure the fitting
together. One 90 Splice Bar Kit comes with enough hardware for one
T fitting; you will need two kits for a tray cross over.
To create a cross over, duplicate the T-fitting on the opposite side of
the continuous tray.
For extra strength you may cut the side wires from the tip of the
intersecting tray and clamp the extra length to the bottom of the
continuous tray. Clamp the mesh using clamp washers and carriage
bolts; included in 90 Splice Bar Kit (See Terminating Tray images on
bottom right for detail).
Always install bolt heads on the inside of the tray to protect cables.
Bonding of painted trays and connectors requires metal-to-metal contact between
tray wires and the splice. Remove paint where the splices contact the tray and 90
splice bar.
Installing a ground conductor along fitting using P/N 34838-001 is required to
insure bonding across removed sections (See page 8 for details).
The cable tray employing these splice methods is suitable for use as an
equipment grounding conductor.
Continuous Tray
Cut away side wires wider
than intersecting tray.
T-Intersection with clamp washers
Terminating Tray
(Cut for clamp washers)
Best Practice Grounding
Ground Conductor Installed on Tight 90 Turn
Page 8 of 10
Installation Instructions
OnTrac Cable Tray
Always install a grounding conductor across field cut fittings.
When properly spliced as indicated previously in this document, OnTrac
cable tray and splice hardware will create a UL Classified equipment
grounding pathway.
Run a #6 AWG ground wire from a secure grounding point to the cable
tray and use CPI P/N 34838-001 Split Bolt Grounding Clamp to attach
the #6 AWG ground wire to OnTrac cable tray. Check to insure that a
#6 AWG ground wire will be adequate for your application (See images
on this page for detail).
For painted trays ensure that there is metal-to-metal contact by
removing the paint where the Split Bolt Grounding Clamp contacts the
cable tray.
P/N 34838-001: Split Bolt Grounding Clamp
Best Practice Tray Support
Proper Splice Locations
Locate supports adjacent to each splice so that the support is
Page 9 of 10
Installation Instructions
OnTrac Cable Tray
positioned close to the splice, within one mesh (4) and one quarter of
the length of the support span. (See image below)
If the splice joint does not lie between the support and quarter point, the
tray will not support the rated load capacities.
A support must be used between every splice. The support span should
not be more than the straight section tray length to ensure no more
than one splice is located between any two supports.
Never place the splice point of the tray directly on the support.
Page 10 of 10
