Spot the violations

Status
Not open for further replies.
R

ronmath

Senior Member
Location
Burnsville, MN
Parallel 4#350 feeds from a single 600A fused switch fused at 600 amps to gutter as shown in attached picture. 1 set of 350 feeds 200 amp panel, other set of 350 feeds (3) rooftop units, 45A/3P breakers. This is in New York.
 
Parallel conductors must comply with 310.4, which what you have discribed does not.

What you have would be a tap and most likely would not meet any of the feeder tap rules in 240.21(B).

Chris
 
Aside from some EMT support issues the panel should have a main or OCPD ahead of it.
 
You guys are good! (Unlike the guy who wired this). That's what I saw also.

310.4 The parallel conductors must be combined on both ends.

240.21(B) The taps are over 10 times smaller than the feeding overcurrent device.

The panel tap does not terminate in a single device to limit the current from 600 amps on a 200 amp panel.

I think that is it unless someone can come up with something else.
 
Are there any grounds in that thing? Are any of those sets of single breakers actually be using a 2p breaker or handle tie?
 
Since the 350s were "pulled" rather than "layed" would this wireway not be required to meet 376.23(B) and thus 314.28 ?
 
jflynn said:
It appears the wireway is undersized for both fill and wire bending radius...
Click to expand...

article 376.23A states that only the (1) wire per terminal in table 312.6A is required for sizing wire ways where conductors are deflected. That would put the minimum required at 5". It looks like a 6 x 6, and at 20% 7.2 sq". with (8) 350,(4)4/0, and (9)#6 awg, that would be 5.9 "sq.
Augie said:
Since the 350s were "pulled" rather than "layed" would this wireway not be required to meet 376.23(B) and thus 314.28 ?
Click to expand...

Augie, 376.23(B)/314.28 would be distance between raceways. The conductors appear to end in the wireway.
icon10.gif


Rick
 
Status
Not open for further replies.
Top