Feeder size

[hardworkingstiff]

A friend of mine called me and told me about a situation he has. They installed a panel/control panel for a gas station (E-Stop, surge protection, pump controls all built in and pre-wired so you just land your wiring on their terminal stirp). The building electrician was to bring power to this panel. The connected load are a few electronic dispensers and 3 submerged pumps in the tanks. Calculated load is well under 100-amps.

Here's what happened. The company supplying the control panel told the building EC that they needed 100-amps. Then somehow (who knows, probably got a deal on a stock item or mis-purchase for another job and pawning it off here) the control panel showed up with a 200-amp main. The building EC provided the 100-amp circuit. The connected load is still under 100-amps.

My take is since the connected load is still under 100-amps, then feeding the 200-amp MB with a 100-amp circuit is not a problem (there should not be any additional wiring added). Am I wrong/right?

 

[iwire]

It is not a code problem at all.

You may get some that question it but we can always use a disconnect rated higher than needed.

 

[hardworkingstiff]

Thanks Bob, that was my thinking too.

Edit: Eric, here is your question.

 

[allenwayne]

Why would anyone question that as long as the OCPD an associated wiring match and the panel is at or over 100 amps there is no problem,unless the lugs on the sub panel are not listed for the smaller wire size.That could be the only situation I could see.