Kitchen Wiring Requirements

Old 03-25-04, 07:44 PM
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Kitchen Wiring Requirements

I'm in the process of correcting some wiring issues in my house. My question for today is: Exactly what circuits are needed for a kitchen? I was reading earlier that you should have 2 circuits for the counter tops. So do you need a seperate circuit for the frigerator and microwave?

Thanks in advance.

Old 03-25-04, 10:18 PM
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A good plan would be to use 2-3 circuits that supply only the countertop receptacles and 1 dedicated circuit each for the fridge and the microwave. This would be a code-compliant installation that exceeds minimum standards.
Old 03-26-04, 06:57 AM
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Can the garbage disposal be connected to one of the countertop circuits or does it need to be one of its own?
Old 03-26-04, 07:54 AM
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My understanding is that no, a garbage disposal may not be on one of the coutertop small applicance circuits.
Old 03-26-04, 01:24 PM
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Originally posted by fuller911
Can the garbage disposal be connected to one of the countertop circuits or does it need to be one of its own?
As you can see from the sections of the US NEC I have quoted below the circuits that supply the countertop receptacles may not have other loads. The exceptions do not include kitchen waste disposers. Also disposers usually exceed fifty percent of the circuits rating and since they are fastened in place they must be supplied by a dedicated circuit.

210.23 Permissible Loads.
In no case shall the load exceed the branch-circuit ampere rating. An individual branch circuit shall be permitted to supply any load for which it is rated. A branch circuit supplying two or more outlets or receptacles shall supply only the loads specified according to its size as specified in 210.23(A) through (D) and as summarized in 210.24 and Table 210.24.
(A) 15- and 20-Ampere Branch Circuits. A 15- or 20-ampere branch circuit shall be permitted to supply lighting units or other utilization equipment, or a combination of both, and shall comply with 210.23(A)(1) and (A)(2).
Exception: The small appliance branch circuits, laundry branch circuits, and bathroom branch circuits required in a dwelling unit(s) by 210.11(C)(1), (2), and (3) shall supply only the receptacle outlets specified in that section.
(2) Utilization Equipment Fastened in Place. The total rating of utilization equipment fastened in place, other than luminaires (lighting fixtures), shall not exceed 50 percent of the branch-circuit ampere rating where lighting units, cord-and-plug-connected utilization equipment not fastened in place, or both, are also supplied.

210.52 Dwelling Unit Receptacle Outlets.
This section provides requirements for 125-volt, 15- and 20-ampere receptacle outlets. Receptacle outlets required by this section shall be in addition to any receptacle that is part of a luminaire (lighting fixture) or appliance, located within cabinets or cupboards, or located more than 1.7 m (51/2 ft) above the floor.
Permanently installed electric baseboard heaters equipped with factory-installed receptacle outlets or outlets provided as a separate assembly by the manufacturer shall be permitted as the required outlet or outlets for the wall space utilized by such permanently installed heaters. Such receptacle outlets shall not be connected to the heater circuits.
FPN: Listed baseboard heaters include instructions that may not permit their installation below receptacle outlets.
(B) Small Appliances.
(1) Receptacle Outlets Served. In the kitchen, pantry, breakfast room, dining room, or similar area of a dwelling unit, the two or more 20-ampere small-appliance branch circuits required by 210.11(C)(1) shall serve all receptacle outlets covered by 210.52(A) and (C) and receptacle outlets for refrigeration equipment.
(2) No Other Outlets. The two or more small-appliance branch circuits specified in 210.52(B)(1) shall have no other outlets.
Exception No. 1: A receptacle installed solely for the electrical supply to and support of an electric clock in any of the rooms specified in 210.52(B)(1).
Exception No. 2: Receptacles installed to provide power for supplemental equipment and lighting on gas-fired ranges, ovens, or counter-mounted cooking units.

copyright 2002 the National Fire Protection Association.

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