Wireway extension collar

K

KBot9

Member
Location
NYC
Occupation
Contractor
I'm trying to figure if it is in any manner against NEC to add a wireway collar (open in back) and screwed to the front of an existing wireway, removing its cover (the existing WW is near 20% fill), to increase the total area and add more conductors within the collar area, but of course less than 30 conductors total combined old and new ?
 
Wireways are designed to be cut and punched. I don't see why you couldn't make your own collar.
 
Yes exactly like an extension box where we either have it made or cut out the back of a wireway and screw it to the front of an existing one.
 
If the original wireway is not custom made, the manufacturer may have one with matching holes.
 
KBot9 said:
I'm trying to figure if it is in any manner against NEC to add a wireway collar (open in back) and screwed to the front of an existing wireway, removing its cover (the existing WW is near 20% fill), to increase the total area and add more conductors within the collar area, but of course less than 30 conductors total combined old and new ?
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I've done it above some big dimmer cabinets in auditoriums. when you cut out the back of them they become a little flimsy, but they will work.
 
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