We're putting in a 600 amp panel and the contractor is re-using 3-4/0 MC cables for the feeder but the main breaker lugs only accepts two conductors per phase. Thinking of using a distribution block with the 3-4/0 in and 2-350's out. Can this block be mounting in the panel inclosure, which has ample space? If not, what would be the minimum size j-box? Thanks.
Power Distribution Block
- Thread starter orr263
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from the 06 white book
you have to check the mfg instructions
POWER DISTRIBUTION BLOCKS
(QPQS)
This category covers power distribution blocks rated 600 volts or less and
intended to be used on the load side of service equipment in accordance
with the National Electrical Code, NFPA 70. These blocks are used for splicing
and tapping conductors in metallic wireways, auxiliary gutters, junction
boxes, termination boxes and the like in order to distribute power to separate
circuits or loads.
Installation instructions are provided for proper mounting and use. These
instructions include minimum enclosure dimensions.
For additional information, see Electrical Equipment for Use in Ordinary
Locations (AALZ).
you have to check the mfg instructions
POWER DISTRIBUTION BLOCKS
(QPQS)
This category covers power distribution blocks rated 600 volts or less and
intended to be used on the load side of service equipment in accordance
with the National Electrical Code, NFPA 70. These blocks are used for splicing
and tapping conductors in metallic wireways, auxiliary gutters, junction
boxes, termination boxes and the like in order to distribute power to separate
circuits or loads.
Installation instructions are provided for proper mounting and use. These
instructions include minimum enclosure dimensions.
For additional information, see Electrical Equipment for Use in Ordinary
Locations (AALZ).
- Location
- Illinois
- Occupation
- retired electrician
Many breaker manufacturers have different size lug kits for there large breakers that can be field installed. Have you checked?
Don
Don
Charlie, thanks for the post but could you clarify it? What is the O6 whitebook? I haven't been able to find anything in the NEC relating to distribution blocks in enclosures. I was unable to find any information on a minimum box size on the Ferraz Shawmut website. Any direction to the right article would be appreciated.
Don,thanks for the post. The breaker is a 600A, Cutler-Hammer LG frame, the supplier tells me there's not a lug kit availible that'll take 3-4/0's per phase for this breaker.
Don,thanks for the post. The breaker is a 600A, Cutler-Hammer LG frame, the supplier tells me there's not a lug kit availible that'll take 3-4/0's per phase for this breaker.
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