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#44937 - 11/16/04 02:53 AM Sub Panel
Megawatt Offline

Registered: 03/11/04
Posts: 74
Loc: Lexington,Ky, USA
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

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#44938 - 11/16/04 03:09 AM Re: Sub Panel
zapped208 Offline

Registered: 02/18/03
Posts: 201
Loc: Somewhere in USA
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 05:36 AM Re: Sub Panel
Dave55 Offline

Registered: 05/08/04
Posts: 666
Loc: Crystal Lake, Illinois, USA
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 07:33 AM Re: Sub Panel
NJ Wireman Offline

Registered: 08/26/04
Posts: 179
Loc: New Jersey (South Jersey)
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 12:02 PM Re: Sub Panel
velect Offline

Registered: 05/01/04
Posts: 79
Loc: st joseph mi usa
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 12:59 PM Re: Sub Panel
CharlieE Offline

Registered: 04/23/04
Posts: 204
Loc: Indianapolis
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.

- - - - - - - - - - - - - - - - - - - - - - - - - - -
Charlie Eldridge, Indianapolis, Utility Power Guy
Charlie Eldridge, Indianapolis Utility Power Guy

#44943 - 11/16/04 03:42 PM Re: Sub Panel
Megawatt Offline

Registered: 03/11/04
Posts: 74
Loc: Lexington,Ky, USA
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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