I'm no expert, so please correct me if I don't understand this
correctly. I understood that 15 Amp outlets are all rated for 20 Amps.
The 20 Amp outlets have that T slot that will allow for devices that
can draw more than 15 amps to be plugged in. Hence you cannot use
20Amp outlets in a 15 amp circuit, but 15 amp in 20 amp circuits are
The ratings on the outlets are molded into the plastic bodies. All the
15A oulets in my stock are labeled '15A', period.The 20A outlets are
labeled '20A'. That seems to indicate that using the 15A's above
their capacity is not appropriate. Note that repair plugs also have
molded in ratings like outlets. HTH
Today I purchased some duplex GFCI receptales and the 20amp/20amp pass
through in the color I wanted was on sale cheaper than the 15amp/20amp
pass through, so in this case I got the 20/20, otherwise I'd have the
On Fri, 9 Feb 2007 20:34:36 -0500, "RBM" <rbm2(remove
If you do, and mistakenly plug a 20A appliance in it will trip the
breaker. The GFCI will realize that this was an improper tripping
(since it's SURE it's on a 20A circuit), and start a fire anyway :-)
True, but generally preferred wiring practice these days is to use
pigtails for receptacles and not pass through the device itself.
Common sense would dictate that an 89 cent duplex oulet is a dubious
candidate for long term survival at the 20 amp level. Of course,
everyone can make whatever decisiuon they are comfortable with.
I think you are wrong and I think I know where you got the idea.
It is ok to use a 15 amp receptacle on a 20 amp circuit, but not
becasue the receptacle can carry 20 amps. Rather it is because no
plug for a 20 amp device will fit into the slots in the 15 amp
receptacle. But such a plug |- would fit into a 20 amp receptacle
You could pplug in two 15 amp items, such as heaters, one in each half
of a 15 or 20 amp receptacle, and you'd be exceeding the capacity of
the receptacle, but the fuse should blow when you do that. They say
the fuse or circuit breaker is there to protect the wiring, but it
occurs to me that it also protects the receptacle.
If IUC by pass-through they don't mean how much is used through the
receptacle (by plugging something into it), but how much can go from
the feed wires, through the metal parts on the sides, the bridges, and
on to the next receptacle. Like when wires are connected to all four
screws of the recep, two from the fuse box, and two going onto the
next recep. Maybe it's pass-through that confused you, but that
doesn't refer to how much can be plugged into that recep.
This is getting kind of nit-picky, but the OP said "an outlet".
Technically "outlet" could refer to a light, one or more receptacles,
A standard dual 15A receptacle is a single outlet but two receptacles,
and would be perfectly acceptable on a 20A circuit.
A side question: why is the Canadian standard practice for kitchen
outlets to use split duplex outlets (upper outlet on opposite phase from
lower outlet) with 3-wire wire and 2-pole 15 amp breaker, while the US
standard practice seems to be a single 20 A circuit feeding both halves
of the outlet?
Each has advantages compared to the other.
Nec requires at least two circuits for the kitchen outlets, and with counter
outlets being no more than 4 feet apart, it assures your appliance will be
close to an outlet, but it doesn't guaranty that you have at least two
circuits at all counter locations. The Canadian method makes good sense
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