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#44937 11/16/04 05:53 AM
Joined: Mar 2004
Posts: 76
Looking for some ideas on a sub fed panel.
I took over somewhat of a mess on a remodel. The first EC put in a 200 amp three phase panel, for a residential installation that only had 1 A/C unit that was three phase.
Installed all of the existing circuits into the new panel & forgot to dodge the three phase buss.
Needless to say after the GC had to replace most of the major appliances, He decided He had to change EC's.
Now My problem is the new panel doesn't have any more space for all of the new circuits so I'll have to set a Sub.
How much do You Guys think would be the limit for a sub fed panel ???
Looks like it will need to have 10 - 15 amp single pole, 6- 20 amp single pole,3-30 amp double pole breakers.
Any ideas ?
I've just done a walk thru, & only agreed to take it at T&M.
Sure wish I could've started this project....Would've done the service much different.
Thanks in advance

#44938 11/16/04 06:09 AM
Joined: Feb 2003
Posts: 198
Just get a 30 circuit MLO panel and feed it with 100amp breaker.
Main breaker panels are less money though, go figure.

Shoot first, apologize later.....maybe
#44939 11/16/04 08:36 AM
Joined: May 2004
Posts: 697
Square D QO makes a 100-amp, 32-space panel,Megawatt. I'd also feed it at 100-amp, but I like placing the 240-volt circuits in the main panel. I'd also consider replacing the cover on the main panel instead of using all those breaker knockout plugs.


#44940 11/16/04 10:33 AM
Joined: Aug 2004
Posts: 186
I'd have to agree with dave on replaceing the cover those blanks never hold up and i've seen to many jobs when you open the panel and wham 10 open spots for people to point at, maybe alittle to close one day. For the small cost replace it, it shows you give a crap.

#44941 11/16/04 03:02 PM
Joined: May 2004
Posts: 81
None of the POCOs around here allow 3-phase in any residential application. You could ask the local POCO to change the service to 120/208

#44942 11/16/04 03:59 PM
Joined: Apr 2004
Posts: 201
None of the POCOs around here allow 3-phase in any residential application.
.We have a good set of reason for that.
  • 208 volts does not work as well for electric ranges, ovens, stove tops, dryers, or water heaters.
  • If it is an underground area, we would have to set a three-phase pad mounted transformer and our smallest size is a 75 kVA.
  • We have to get all three phases to the transformer or transformer bank.
  • The customer or developer would have to pay the difference between the projected 30-month revenue and the estimated cost of supplying service.

Unless the circumstances are really unusual, the answer is just plain no. The only exception we make for that is really large apartment or condominium buildings where we are forced to serve the building with 208. [Linked Image]

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Charlie Eldridge, Indianapolis, Utility Power Guy

Charlie Eldridge, Indianapolis Utility Power Guy
#44943 11/16/04 06:42 PM
Joined: Mar 2004
Posts: 76
Thanks for all the feedback. I hadn't thought of replacing the cover, But it sounds like a worthwhile idea.
I had decided to go with a 30 circuit MLO with a 100 amp feed also, but it's nice to bounce an idea off the LARGEST source of Electrical knowledge in the free world, just to make sure I'm not missing something !!!
Thanks again

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