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Old 11-07-2012, 08:14 AM   #1
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Default feed through lugs

Whats the difference between regular lugs and feed through lugs? oblong shape? In a riser that has feeders from floor to floor instead of bugging the feeders can you put to wires under the panel lugs if there rated??


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Old 11-07-2012, 08:19 AM   #2
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Originally Posted by deanos
Whats the difference between regular lugs and feed through lugs? oblong shape?
Feed through is a term to indicate there are lugs at the bottom of a buss that are connected to the main. So you can have a 200 amp panel with a main, 12 spaces and you can feed out if it at 200 amps. I use these to feed trailer houses.

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Old 11-07-2012, 07:56 PM   #3
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If you have lugs rated for both wires i do not see the problem.
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Old 11-07-2012, 08:34 PM   #4
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While were talking about feed thru lugs. Say it's a 400 amp panel with feed thru lugs. Can you come out of A and B and neutral and feed these 3 polaris taps with say 4/0Cux2 in each then come out with say 8 #1Cu going to 8 - 100 amp sub panels close by?? Is there a limit other than box fill or amount of sub's off feed thru's ??
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Old 11-07-2012, 10:08 PM   #5
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While were talking about feed thru lugs. Say it's a 400 amp panel with feed thru lugs. Can you come out of A and B and neutral and feed these 3 polaris taps with say 4/0Cux2 in each then come out with say 8 #1Cu going to 8 - 100 amp sub panels close by?? Is there a limit other than box fill or amount of sub's off feed thru's ??

Is there a limit? Yes. You can't tap a tap.
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Old 11-07-2012, 10:19 PM   #6
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Is there a limit? Yes. You can't tap a tap.
it's not really tapping a tap I don't think. We just energizing the whole bar and coming off it 8 times....code ref/ article?
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Old 11-07-2012, 10:22 PM   #7
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It's kind of like C-taps which are exempt from tap rules right

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Old 11-07-2012, 10:41 PM   #8
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It's kind of like C-taps which are exempt from tap rules right

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Cellular concrete floor raceways were about the furthest thing from my mind... but I get the idea. I suppose that as long as the ampacity of the first "tap" (at the lugs) is equal to the feeder, then it doesn't count as a tap as defined in 240.2.

Still, I don't know if I'd do it. We wouldn't be allowed to do it stright off a transformer secondary for the reason I stated, so we might as well be consistent even if we tecnically could get away with it.

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