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Cable clamps according to NFPA 805

Question asked by bruno.ochsendorf on Aug 28, 2017
Latest reply on Aug 29, 2017 by bruno.ochsendorf

I need help with the NFPA 805.

 

The next text was copied from the NFPA 805:

 

1- "Wiring above suspended ceiling shall be listed for plenum use, routed in armored cable, routed in metallic conduit, or routed in cable trays with solid metal top and bottom covers."

 

2 - "Only metal tray and metal conduits shall be used for exposed electrical raceways."

 

My question is:

 

According to NFPA 805, is the method C of IEC 60364 permitted?

 

Can we install cables fixed directly to walls or ceilings, using cable clamps, like the product Emperor from Ellis Patents? (see attached images).

 

I'm in doubt, because the standard NFPA 805 says "Only metal tray and metal conduits shall be used for exposed electrical raceways".

I don't know if it means that metal trays and conduits are the only acceptable method, or else, if in case of using conduits and cable trays, these must be constructed using metal (no plastic or glass fiber allowed), meaning that other installation methods are acceptable.

 

Please advise me if we can use cable clamps, and if we do, if the cables must be armored, or they can be standard single and multi-core cables.

 

Thanks in advance.

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