Monday, July 23, 2012

Kitchen Gfci Receptacle and Other Electrical Requirements

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Kitchen Gfci receptacles are required by the 2008 Nec (National Electrical Code) to be installed along the countertop surfaces.

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How is Kitchen Gfci Receptacle and Other Electrical Requirements

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Gfci - (Ground Fault Circuit Interrupter)

Actually, this requirement has been in place since 1996 Nec, and an leading thing to remember:

If you have an older kitchen, and for any presuppose decided to replace a quarterly electrical outlet - you should have a Gfci receptacle installed as a replacement.

Kitchen Electrical Requirements

Kitchen electrical outlets installed above the countertops require at least 2 small appliance subject circuits. Kitchen electrical circuits serving countertop outlets must be rated for 20 ampers (#12 wire) Kitchen Gfci receptacles installed on those 20 amp circuits must be also 20 amp rated
Example: for 5 kitchen Gfci receptacles serving countertops there should be a minimum of 2 circuit breakers (or two fuses) in your electrical panel - one protecting 3 of those outlets, and second responsible for other 2 (or 4 & 1 - it doesn't matter).

Those two or more electrical circuits supplying power to the kitchen Gfci receptacles (above the countertop) must also serve remaining kitchen open walls, pantry and dinning room receptacles.

However, they can not be used for the kitchen lighting or outlets placed within the cabinets or cupboards (sometimes used to for a under the cabinet lights low voltage transformer or quarterly voltage light fixtures, microwave or other constantly installed appliances). Gfci protection is not required for those extra receptacles, but since installed on a 20 amp rated circuits, they must be also 20 amp rated.

There are two exceptions; the two (or more) electrical circuits providing power to the kitchen Gfci receptacles can be also used to:

support operation of an electric clock furnish power to supplemental equipment and lighting on gas ranges, ovens or cook-tops (electronic display, control panels, etc.) What is the amount of required kitchen Gfci protected receptacles above the countertop - it all depends on how long is your countertop...

Every 12" wide section of the kitchen wall countertop space requires a Gfci protected receptacle There must be no point along the kitchen countertop wall line placed supplementary than 24? from the Gfci outlet receptacle (horizontally). Most of the new appliances are adequate with very short electrical cords to preclude them from overheating, tangling, etc. Because of those short appliance cords, electrical outlets spacing should be maintained so close. However, no electrical outlets are required on the wall directly above the kitchen range, cook-top or sink.

Kitchen refrigerator power furnish does not require Gfci protection, just an personel (15amp rating or more) subject circuit (if you have a refrigerator in the stable or an unfinished basement, 2008 Nec decided to put it on a Gfci protected circuit). You can use one of the two small appliance Gfci protected circuits, but an personel circuit makes more sense for this purpose.

Kitchen Gfci requirement also applies to an island and peninsula countertop - if it has a minimum dimensions of 12" x 24" it requires at least one Gfci protected electrical outlet. In case you have a larger island (or any) countertop, divided by the sink, or a cook-top, range, etc., and there is less than 12" of counter-space behind that dividing sink or appliance - each of the sections would require a Gfci protected receptacle.

Kitchen Gfci outlet locations above and below the countertops

Not more than 20" above Not more than 12" below (island and peninsula with no backsplashes, dividers, etc.) if the countertop overhang is 6" or smaller. Those side wall receptacles generate a protection hazard for children reaching them or anything accidentally brushing the hanging cord, but often this is the only choice. I would extremely propose to use that kitchen Gfci protected receptacle under management (if you have small children), and take off the plug as soon as you're finished.

Garbage disposer, dishwasher, microwave do not require Gfci protection, and can not be supplied by the small appliance circuits. Depending on the amount of power they need (check the nameplate or installation instructions), you can whether use 1, 2 or 3 circuits (if nothing else will be on those electrical circuits).

Below are typical ratings of those appliances - they should not use more than 80% of the circuit breaker rating protecting it if on dedicated circuit, or 50% if sharing the circuit with something else:

1/2 Hp garbage disposal - 2.5 amp (WasteMade garbage disposer is the only one I could find with such a small amperage ) dishwasher - 9 to 12 amp microwave - 4.5 to 12 amp
Example: small microwave + garbage disposer = 6 amp + 2 amp = 8 amp - you can setup both of them on a single, dedicated circuit protected by a 20 amp breaker because they will use less than 50% of the breakers' rating (15 amp breaker would be too small)

No face-up kitchen Gfci receptacles (and no unprotected devices of course) are permitted!

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1 comment:

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