Robpags
Member
- Location
- Billerica MA
What feeder size would I use to feed a 4 gang meter bank that feeds (4) 100A main breaker panels?
4Gang meter socket feeder sizing
- Thread starter Robpags
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kwired
Electron manager
- Location
- NE Nebraska
Whatever calculated load using art 220 gives you, is the minimum size conductor you can use.
4-100 amp panels doesn't mean there will be 100 amps of load on each. If they are very small apartments, have gas heating/cooking appliances you very well could see only 100 amp or less load calculation for all four combined.
If a may get on my "semantics" soapbox for a minute.. the wording of your question would lend itself toward your wanting to determining a service conductor size in which case kwired's answer is spot on, Art 220.
IF you are truly sizing a feeder then size of the overcurrent device ahead of the feeder would be a determining factor.
IF you are truly sizing a feeder then size of the overcurrent device ahead of the feeder would be a determining factor.
kwired
Electron manager
- Location
- NE Nebraska
220 calculations still determine the minimum size service or feeder permitted.
Those four 100 amp breakers being supplied do not necessarily have to be supplied with 100 amps each, service or feeder doesn't matter, art 220 load calculation is minimum either way.
peter d
Senior Member
- Location
- New England
Based on your location, I'll go with what is common in this area. A 4 unit building with gas heat and appliances and 2-3 bedrooms per unit can be fed with 200 amps without a problem. You still need to do a load calculation, but I have plenty of direct experience with this kind of installation and a 200 amp feeder is adequate 99% of the time. In fact, 150 amps might even be fine.
thank you, professor
In his case, yes .. service or feeder same... but my intent was to note to the OP or newbie that proper description can make a difference. Assuming a 820 amp load,if you are sizing a service vs a feeder on a 1000 amp OCP device (standard size over 800), it will make a difference.
kwired
Electron manager
- Location
- NE Nebraska
Bottom line is you still needed to go to art 220 before you can come up with the 820 amps of load.thank you, professor
In his case, yes .. service or feeder same... but my intent was to note to the OP or newbie that proper description can make a difference. Assuming a 820 amp load,if you are sizing a service vs a feeder on a 1000 amp OCP device (standard size over 800), it will make a difference.
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