Cable tray and conduit bonding

[rodybike]

This is an issue regarding of bonding communications conduit to the cable tray. We have installed a communications cable tray and attached the tray to the building ground system with a #6 cu BSD. The communication conduits are attached to the cable tray with a 1-hole EMT strap. Article 318 refers to article 250-96. Q: does our method of attachment to the tray satisfy the 250-96 requirement for effective bonding?

 

[websparky]

Re: Cable tray and conduit bonding

This is something that can be subjective to the AHJ.

....shall be effectively bonded where necessary to ensure electrical continuity and the capacity to conduct safely any fault current likely to be imposed on them.

The "likely to be imposed" part.

 

[rasmithircgov.com]

Re: Cable tray and conduit bonding

Size it per 250.102 or make sure it is not pianted as 250.96 addresses.I've never worked with cable tray before so it is hard for me to say if it effectively bonded. Here is what your talking about as in 2002 NEC
ARTICLE 392 Cable Trays
392.7 Grounding.
(B) Steel or Aluminum Cable Tray Systems. Steel or aluminum cable tray systems shall be permitted to be used as equipment grounding conductors, provided that all the following requirements are met:
(1) The cable tray sections and fittings shall be identified for grounding purposes.
(2) The minimum cross-sectional area of cable trays shall conform to the requirements in Table 392.7(B).
(3) All cable tray sections and fittings shall be legibly and durably marked to show the cross-sectional area of metal in channel cable trays, or cable trays of one-piece construction, and the total cross-sectional area of both side rails for ladder or trough cable trays.
(4) Cable tray sections, fittings, and connected raceways shall be bonded in accordance with 250.96 using bolted mechanical connectors or bonding jumpers sized and installed in accordance with 250.102.