2017 National Electrical Code Article 210 Branch Circuits.

Multiwire branch circuits (d) Grouping

The ungrounded and grounded circuit conductors of each multiword branch circuit shall be grouped in accordance with 200.4(b)

Arc-Fault Circuit Interrupter Protection (A) Dwelling Units

All 120 volt, single phase, 15-20 ampere branch circuits supplying outlets or devices installed in dwelling unit kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, Recreation rooms, closets, hallways, laundry areas, or similar rooms or areas shall be protected by any of the means described in 210.12(A)(1)-(6)

Over-current Protection (B) Conductor protection

Conductors shall be protected IAW 240.4. Flexible cords and fixture wires shall be protected IAW 240.5

Ground-Fault Circuit-Interrupter Protection for personnel. Shall be installed

For Boat Hoist outlets not exceeding 240 volts that supply boat hoists installed in dwelling unit locations. Kitchen dishwasher branch circuits. Crawl space lighting outlets not exceeding 120 volts.

Multiwire branch circuits (c) Line-to-Neutral loads

Multiwire branch circuits shall supply only line to neutral loads.

Identification for Branch Circuits (b) equipment grounding conductor

The equipment grounding conductor shall be identified in accordance with 250.119

Identification for Branch Circuits (A) Grounded conductors

The grounded conductor of a branch circuit shall be identified in accordance with 200.6

Number of Branch circuits

The minimum number of branch circuits shall be determined from the total calculated load and the size or rating of the circuits used. in all installations, the number of circuits shall be sufficient to supply the load served. in no case shall the load of any circuit exceed the maximum specified by 220.18 (proper wire gauge)

Over-current Protection (A) Continuous and NonContinuous Loads

Where a branch circuit supplies continuous loads or any combination of continuous and noncontinuous loads, the rating of the overcurrent protection device shall not be less than the noncontinuous load plus 125% of the continuous load.

Multiple Branch Circuits

Where two or more branch circuits supply devices or equipment on the same yoke or mounting strap, a means to simultaneously disconnect the ungrounded supply conductors shall be provided at the point at which the branch circuits originate.

Ground-Fault Circuit-Interrupter Protection for personnel. (b) Other Than Dwelling Units

receptacles rated 150 Volts to ground or less, 50 amperes or less and three phase receptacles rated 150 volts to ground or less, 100 amperes or less installed in the following locations shall have ground fault circuit interrupter protection n for personnel. (1) Bathroom (2) Kitchens (3) Rooftop. (4) outdoors (5)Sinks- where receptacles are installed within 6 ft from top inside edge of sink.

Ground-Fault Circuit-Interrupter Protection for personnel. (a)Dwelling units

All 125 volt single phase, 15- and 20- ampere receptacles installed in the locations specified in 210.8(A)(1)-(10) shall have ground fault circuit interrupter protection for personnel. (1) Bathrooms (2)Garages, and also accessory buildings that have a floor located at or below grade level not intended as habitable rooms and limited to storage areas, work areas, and areas of similar use. (3) outdoors.

Ungrounded conductors tapped from grounded systems

Two wire DC circuits and AC circuits of two or more ungrounded conductors shall be permitted to be tapped from the ungrounded conductors of the circuit that have a grounded neutral conductor. Switching devices in each tapped circuit shall have a pole in each ungrounded conductor. All poles of multipole switching devices shall manually switch together where such switching devices also serve as a disconnecting means as required.

Load evenly proportioned among branch circuits.

Where load is calculated on the basis of volt-amperes per square meter or per square foot, the wiring system up to and including the branch-circuit panel board shall be provided to serve not less than the calculated load. This load shall be evenly proportioned alone multi outlet brand circuits within the panelboard. Branch circuit overcorrect devices and circuits shall be required to be installed only to serve the connected load.

Conductors- Minimum ampacity and size (A) branch circuits not more that 600 Volts 210.19(A)(1)(a) or (b)

(a) Where branch circuit supplies continuous loads or any combination of continuous and noncontinuous loads, the minimum branch-circuit conductor size shall have an allowable ampacity not less than the noncontinuous load plus 125 percent of the continuous load. (b) The minimum branch-circuit conductor size shall have an allowable ampacity not less than the maximum load to be served after the application of any adjustment or correction factors.kdf

Dwelling Unit, max length of the branch circuit wiring from the overcurrent device to first outlet.

14 AWG is 50ft, 12 AWG 70ft.

Branch circuit, multiwire definition

A branch circuit that consists of two or more ungrounded conductors that have a voltage between them, and a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit and that is connected to the neutral or grounded conductor of the system

Kitchen Receptacle Requirements-Island countertop spaces

At least one receptacle shall be installed at each island countertop space with a long dimension of 12in or greater.

Conductors- Minimum ampacity and size (A) branch circuits not more that 600 Volts

Branch circuit conductors shall have an ampacity not less than the maximum load to be served. Conductors shall be sized to carry not less than the larger of 210.19(A)(1)(a) or (b)

GFCI-circuits derived from autotransformers.

Branch circuits shall not be derived from autotransformers unless the circuit supplied has a grounded conductor that is electrically connected to a grounded conductor of the system supplying the autotransformer.

Ground Fault Protection of Equipment

Each branch circuit disconnect rated 1000A or more and installed on solidly grounded wye electrical systems of more that 150 volts ground, but not exceeding 600 volts phase to phase, shall be provided with ground fault protection of equipment IAW provisions of 230.95

Multiwire branch circuits disconnecting means.

Each multi wire branch circuit shall be provided with a means that will simultaneously disconnect all ungrounded conductors at the same point where the branch circuit originates.

Dwelling Unit, branch circuit wiring shall be continuous

From the branch circuit overcorrect device to the outlet branch circuit arc fault circuit interrupter.

Dwelling Units-Garage Branch Circuits

In addition to the number of branch circuits required by other parts of this section, at least on 120 volt, 20 ampere branch circuit shall be installed to supply receptacle outlets in attached garages and in detached garages with electric power. this circuit shall have no other outlets.

Dwelling Units-Bathroom Branch circuits

In addition to the number of branch circuits required by other parts of this section, at least one 120 volt, 20 ampere branch circuit shall be provided to supply the bathroom receptacle outlet. such circuits shall have no other outlets.

Dwelling Units-Laundry Branch Circuits

In addition to the number of branch circuits required by other parts of this section, at least one additional 20 ampere branch circuit shall be provided to supply laundry receptacle outlets. This circuit shall have no other outlets.

Kitchen Receptacle location

Receptacle outlets shall be located on or above, but not more that 20in above, the countertop or work surface. Receptacle outlet assemblies listed for use in countertops or work surfaces shall be permitted to be installed in countertops or work surfaces. receptacle outlets rendered not readily accessible by the appliances fasted in place, appliance garages, sinks, or range tops as covered in this section.

Dwelling unit, The first outlet box in the branch circuit

Shall be marked to indicate that it is the first outlet of the circuit.

Kitchen Receptacle requirements- Wall countertops and work surfaces

A receptacle outlet shall be installed at each wall countertop and work surface that is 12in or wider. Receptacle outlets shall be installed so that no point along the wall line is more than 24in measured horizontally from receptacle outlet in that space

Conductors-Minimum ampacity and size- household ranges and cooking appliances.

Branch circuit conductors supplying household ranges, wall mounted ovens, counter mounted cooking units and other household cooking appliances shall have an ampacity not less than the rating of the branch circuit and not less than the maximum load to be served. For ranges of 8 3/4 kW or more rating, the minimum branch circuit rating shall be 40 amperes.

Dwelling Units-Small appliance branch circuits

In addition to the number of branch circuits required by other parts of this section, two or more 20 ampere small appliance branch circuits shall be provided for all receptacle outlets specified by 210.52(B).