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Overload? #95279
09/06/05 07:00 PM
09/06/05 07:00 PM
J
jes  Offline OP
Member
Joined: Jul 2002
Posts: 103
CT
15 Amp, 125 volt branch circuit with duplex 15 Amp, 125 volt receptacles. Plugged into a single duplex are two 6.5 Amp (nameplate) commercial referigerators, one into each position. For the sake of discussion there are no other loads. Does this violate ANY ratings or NEC requirements?

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Re: Overload? #95280
09/06/05 07:14 PM
09/06/05 07:14 PM
L
luckyshadow  Offline
Member
Joined: Jan 2005
Posts: 315
Maryland USA
I would say no.
I believe a refrigerator is not a continuous load ( on for 3 or more hours). The compressor will cycle on and off but should not run continuous.

Re: Overload? #95281
09/06/05 08:27 PM
09/06/05 08:27 PM
R
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
210.21(B)(2)
If the "duplex" receptacle is considered 2 receptacles, (and I believe it is) you would have a violation.

Re: Overload? #95282
09/06/05 08:42 PM
09/06/05 08:42 PM
R
Roger  Offline
Member
Joined: May 2002
Posts: 1,716
N.C.
Redsy, since this is in fact two receptacles, neither one would be loaded to the maximum limit of Table 210.21(B)(2) for a 15 amp receptacle.

Roger

Re: Overload? #95283
09/06/05 09:24 PM
09/06/05 09:24 PM
R
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
OK, so it's per each receptacle?

Re: Overload? #95284
09/06/05 10:40 PM
09/06/05 10:40 PM
G
George Little  Offline
Member
Joined: Jan 2004
Posts: 1,489
Michigan USA
No overload, no violation but poor design. Just a matter of time before both units start at the same time and that could spell problem.


George Little
Re: Overload? #95285
09/08/05 05:27 AM
09/08/05 05:27 AM
J
jes  Offline OP
Member
Joined: Jul 2002
Posts: 103
CT
And no argument...

To change the question slightly...
Suppose the duplex were split and each receptacle had it's own 15 Amp circuit.
A load of 12 Amps could be connected to each, giving a total current of 24 amps through a standard, everyday, less than $1, duplex receptacle, correct?

Re: Overload? #95286
09/08/05 06:50 AM
09/08/05 06:50 AM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Yes that is correct.

Now how long would that cheap receptacle would last is another question altogether.


Bob Badger
Construction & Maintenance Electrician
Massachusetts

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