Dishwasher, counter, and disposal on one circuit

[hausdok]

Okay Guys,

Having a brain fart here. I still haven't unpacked all of my stuff after the move and can't find the references I need.

Had remodeled 1909 bungalow that had been completely rewired yesterday. Found a dishwasher, disposal and countertop outlets all on one GFCI yesterday. Memory is telling me disposal and dishwasher can be on the same MWBC but that there has to be a handle tie. It's also telling me two 20-amp appliance circuits, but I can't remember if it allows these other two on the same circuit.

What say you gurus?

ONE TEAM - ONE FIGHT!!!

Mike

[cguffin]

Kitchen counter top receptacles must be supplied by a min... of two 20 amp circuits and must be GFCI protected. These small appliance branch circuits can can serve other general purpose outlets, but cannot supply disposals, dishwashers, exhaust hoods, or fans all of which typically require dedicated circuits. A laundry must have its own 20 amp small appliance circuit for the washer and other small appliances.

This is from JLC Field Guide vol.2 Best practice.

Thanks for the opportunity

[hausdok]

Kewl! Now the cobwebs are clearing. Now if I could just remember which box the danged code stuff is in.

OT - OF!!!

M.

[Jesse]

This is not a challenge, but a real question:

The reference quoted is a best practice guide, so there's no doubt that the methods described are good stuff. Is there a code reference that states the same? I'm far from a code-geek, but it doesn't ring a bell in my empty cavernous cranium.

[charlieb]

Here's part:

SECTION E3603

REQUIRED BRANCH CIRCUITS

E3603.2 Kitchen and dining area receptacles. A minimum of two 20-ampere-rated branch circuits shall be provided to serve receptacles located in the kitchen, pantry, breakfast

area, dining area or similar area of a dwelling. The kitchen countertop receptacles shall be served by a minimum of two 20-ampere-rated branch circuits, either or both of which shall also be permitted to supply other receptacle outlets in the kitchen, pantry, breakfast and dining area including receptacle outlets for refrigeration appliances.

E3603.3 Laundry circuit. A minimum of one 20-ampere-rated branch circuit shall be provided for receptacles located in the laundry area and shall serve only receptacle outlets located in the laundry area.

[charlieb]

E3601.5Multiwire branch circuits. All conductors for multiwire branch circuits shall originate from the same panelboard. Where two or more devices on the same yoke or strap are supplied by a multiwire branch circuit, a means shall be provided at the panelboard where the circuit originates to simultaneously disconnect all ungrounded conductors of the multiwire circuit. Except where all ungrounded conductors are opened simultaneously by the branch-circuit overcurrent device, multiwire branch circuits shall supply only line-to-neutral loads or only one appliance.

[charlieb]

E3802.6 Kitchen receptacles.All 125-volt, single-phase, 15- and 20-ampere receptacles that serve countertop surfaces shall have ground-fault circuit-interrupter protection for personnel.

All 2003 IRC

[charlieb]

E3602.3 Fifteen- 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. The rating of any one cord- and plug-connected utilization equipment shall not exceed 80 percent of the branch-circuit ampere rating. The total rating of utilization equipment fastened in place, other than 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.

E3602.7Branch circuits servingmotor-operated andcombination loads. For circuits supplying loads consisting of motor-operated utilization equipment that is fastened in place and that has a motor larger than 0.125 horsepower in combination with other loads, the total computed load shall be based on 125 percent of the largest motor load plus the sum of the other loads.

E3801.3 Small appliance receptacles. 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 Section E3603.2, shall serve all receptacle outlets covered by Sections E3801.2 and E3801.4 and those receptacle outlets provided for refrigeration appliances.

Exceptions:

1. In addition to the required receptacles specified by

Sections E3801.1 and E3801.2, switched receptacles

supplied from a general-purpose branch circuit as

defined in Section E3803.2, Exception 1, shall be

permitted.

2. The receptacle outlet for refrigeration appliances

shall be permitted to be supplied from an individual

branch circuit rated at 15 amperes or greater.

E3801.3.1 Other outlets prohibited. The two or more small-appliance branch circuits specified in Section 3801.3 shall serve no other outlets.

Exceptions:

1. A receptacle installed solely for the electrical sup-

ply to and support of an electric clock in any of the

rooms specified in Section E3801.3.

2. Receptacles installed to provide power for supple-

mental equipment and lighting on gas-fired

ranges, ovens, and counter-mounted cooking

units.

E3801.3.2 Limitations. Receptacles installed in a kitchen to serve countertop surfaces shall be supplied by not less than two small-appliance branch circuits, either or both of which shall also be permitted to supply receptacle outlets in the same kitchen and in other rooms specified in Section

E3801.3. Additional small-appliance branch circuits shall be permitted to supply receptacle outlets in the kitchen and other rooms specified in Section E3801.3. A small appliance branch circuit shall not serve more than one kitchen.

This is closer to point

[cguffin]

Good job Charlie,

I had to read almost the whole IRC book to locate all that.[:-hypnoti

Thanks,

Craig

[Chad Fabry]

Where two or more devices on the same yoke or strap are supplied by a multiwire branch circuit, a means shall be provided at the panelboard where the circuit originates to simultaneously disconnect all ungrounded conductors of the multiwire circuit

I know what the whole thing means, please explain a yoke and strap

[rlskfoster]

The yoke or strap is the frame of the device. So a duplex receptacle or a switch plug combo could be configured to have a multiple circuit to it with each outlet individually breakered, in that instance, the two breakers of the multi wire circuit should be tied together with either a tie bar or a two-pole breaker so that both circuits can be de-energized for maintenace or repair.

Buster

[hausdok]

Thank You All,

I've got what I needed. I'll try and return the favor one day.

OT - OF!!!

M.

[chicago]

Unfortunately in the chicagoland area you will find dishwashers and disposal units when retrofit are simply BXed to the closest junction box.Thats how installation companys do 10 plus stops a day to keep on schedule.

[Chad Fabry]

Thanks Buster