Equipotental requirements for motors frames
- Thread starter mustafa
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jumper
Senior Member
- Location
- 3 Hr 2 Min from Winged Horses
I am not sure exactly what you are asking. Are you trying to provide lightning protection for a single motor?
This the scope of 780 from the NFPA website:
NFPA 780: Document Scope
1.1 Scope. 1.1.1 This document shall cover traditional lightning protection system installation requirements for the following: (1) Ordinary structures (2) Miscellaneous structures and special occupancies (3) Heavy-duty stacks (4) Watercraft (5) Structures containing flammable vapors, flammable gases, or liquids that give off flammable vapors 1.1.2* This document shall not cover lightning protection system installation requirements for electric generating, transmission, and distribution systems. 1.1.3 This document shall not cover lightning protection system installation requirements for early streamer emission systems or charge dissipation systems.
What does NFPA 780 address?
This Standard covers traditional lightning protection system installation requirements for ordinary structures; miscellaneous structures and special occupancies; heavy-duty stacks; watercraft; wind turbines; structures housing explosive materials; and structures containing flammable vapors, flammable gases, or liquids that give off flammable vapors.
This the scope of 780 from the NFPA website:
NFPA 780: Document Scope
1.1 Scope. 1.1.1 This document shall cover traditional lightning protection system installation requirements for the following: (1) Ordinary structures (2) Miscellaneous structures and special occupancies (3) Heavy-duty stacks (4) Watercraft (5) Structures containing flammable vapors, flammable gases, or liquids that give off flammable vapors 1.1.2* This document shall not cover lightning protection system installation requirements for electric generating, transmission, and distribution systems. 1.1.3 This document shall not cover lightning protection system installation requirements for early streamer emission systems or charge dissipation systems.
What does NFPA 780 address?
This Standard covers traditional lightning protection system installation requirements for ordinary structures; miscellaneous structures and special occupancies; heavy-duty stacks; watercraft; wind turbines; structures housing explosive materials; and structures containing flammable vapors, flammable gases, or liquids that give off flammable vapors.
iceworm
Curmudgeon still using printed IEEE Color Books
- Location
- North of the 65 parallel
- Occupation
- EE (Field - as little design as possible)
I'm not interested in doing your research for you. So, a couple of questions:
1. What references have you looked at so far - NEC? IEEE? NFPA?
2. Are you concerned with code (regulatory) minimums? Or
Industry standard Agricultural?
Industry standard commercial?
Industry standard Industrial?
Industry standard commercial?
Industry standard Industrial?
ice
- Location
- Illinois
- Occupation
- retired electrician
It is not required by the NEC. The EGC connection to the motor at the motor junction box is all that is required by the NEC. Contract documents often call for additional bonding for the motor and driven equipment in industrial applications.
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