NFPA 79

[Bob_01810]

Section 13.1.6.1 of NFPA 79 states "Exposed cables installed along the structure of the equipment or system or in the chases of the machinery shall be permitted." I cannot find a definitions in NFPA 70 or 79 for "chases". Can a steel tube that makes up the frame of a machine be considered a chase? Can cables be run within the frame of a machine?

 

[petersonra]

Section 13.1.6.1 of NFPA 79 states "Exposed cables installed along the structure of the equipment or system or in the chases of the machinery shall be permitted." I cannot find a definitions in NFPA 70 or 79 for "chases". Can a steel tube that makes up the frame of a machine be considered a chase? Can cables be run within the frame of a machine?

Interesting that there is not a definition of chase given what we call chases is not defined in the online dictionaries I looked at.

My opinion is it is some kind of a enclosed or unenclosed path from one place to another other than a raceway.

What you are describing is common though.

 

[iceworm]

As all know:

1. definitions in the specific NEC article
2. NEC article 100
3. IEEE 100 (commonly defined technical terms from related codes and standards)
4. Funk and Wagnall's (commonly defined general terms)

Except I couldn't find an F & W. So, from The American Heritage® Dictionary of the English Language, 5th Edition.

"noun A trench or channel for drainpipes or wiring.​

 

[Jraef]

Looks like you are not the first one to notice; This is from 2002 proposals.


The response was that it was not accepted, because it was covered elsewhere.


So you can, I guess, infer from this that a "chase" is defined somewhere in that 14.1.4.8 list. i.e. a wireway or a covered walkway INTENDED for cables.