What can a multiwire branch circuit supply?

Multiwire branch circuits must supply only line-to-neutral loads [210.4(C)]. Exception 1: A multiwire branch circuit can supply line-to-line utilization equipment, such as a range or dryer.

How many branch circuits are required for a split switched receptacle?

ANSWER: 210-4 Multiwire Branch Circuits (b) Dwelling Units. In dwelling units, a multiwire branch circuit supplying more than one device or equipment on the same yoke shall be provided with a means to disconnect simultaneously all ungrounded conductors at the panelboard where the branch circuit originated.

Does a duplex outlet count as one or two outlets?

A duplex receptacle is an example of a multiple receptacle that has two receptacles on the same yoke or strap. A duplex receptacle is a single contact device with no other contact device on the same yoke or strap.

When would you use a multi wire branch circuit?

Multiwire branch circuits are used in offices, hospitals, hotels, high-rise residential buildings, or similar facilities for a variety of power distribution systems including lighting, devices, and receptacles.

Are multi-wire branch circuits legal?

The National Electrical Code permits multiwire branch circuits, but adds requirements to make them safer. Section 210.4(B) states that in the panelboard where the branch circuit originates, all ungrounded conductors must be provided with a means to disconnect them simultaneously.

What are the two cases where outdoor receptacles are exempt from GFCI protection?

List the two cases where outdoor receptacles are exempt from GFCI protection. Outdoor receptacles are required to be GFCI protected, 210.8(A)(3). Exempt are receptacles that are not readily accessible, are supplied by a dedicated branch circuit, and serve snow-melting or deicing equipment; see 426.28.

Can you split a duplex outlet?

Switched Split Receptacle



A switched split duplex receptacle (also known as a “half hot”) is used to control a table or floor lamp with a wall switch near the room entrance. Half of the duplex is connected to the switch and the other half is always hot.

How do you split a duplex receptacle?

Quote from the video:
Quote from Youtube video: And break those tabs off. So here we are get ahold of this tab. And go ahead and take the receptacle on we're just gonna bend. It back and forth. Until it gives up.

Can a multiwire branch circuit be used to supply the two required kitchen circuits?

1 states that a multiwire branch circuit can supply other than line-to-neutral loads if it supplies only one piece of utilization equipment. Exception No. 2 permits other than line-to-neutral loads where all of the ungrounded (hot) conductors are opened simultaneously by the branch-circuit overcurrent device.

What is a multiwire branch circuit?

According to NEC Article 100, a multiwire branch circuit 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.

How many branch circuits are required in a home?

As mentioned in June, a minimum of two small-appliance branch circuits are required in kitchens. [210.52(B)(1)] Kitchen countertop surfaces have the same requirement. At least two small-appliance branch circuits are required to feed the receptacles that serve countertop surfaces in a kitchen. (See Figure 1.)

How do you identify a multiwire branch circuit?

How to recognize them. Multi-wire branch circuits will typically be supplied by two adjacent breakers in a panel, and will often be fed using 3-wire plus ground cable. If the circuit was installed properly, the breakers handles should be tied together or a double pole breaker will be used.

How many general purpose branch circuits are installed?

The minimum number of 20-ampere, 2-wire general-purpose branch circuits for lighting and receptacles in this dwelling is three. Be careful when calculating the minimum number of 20-ampere branch circuits. At least one 20-ampere laundry circuit and at least two 20-ampere small-appliance branch circuits are required.

How do you wire a multiwire branch to a GFCI circuit?

Connect the black from the 12/3 to the line hot side of the GFCI and a short piece (6 in) of white wire to the line neutral side of the GFCI. Connect the white wire of the 12/2 going out to the next GFCI (other circuit) to the white from the 12/3 AND to the short pigtail.

What are the three types of branch circuits?

Branch Circuits

  • General Purpose Branch Circuit.
  • Appliance Branch Circuits.
  • Individual Branch Circuit.


What residential branch circuits are required in modern homes?

There are several different types of branch circuits in your home.

  • Dedicated appliance circuits. These serve only one appliance and are often required by code. …
  • Lighting circuits. These are what they sound like—circuits that serve general lighting needs in rooms. …
  • Outlet circuits. …
  • Room circuits.


How do you determine which outlets and fixtures are on which branch circuit?

Plug the lamp into another outlet to determine whether or not that outlet is on the same circuit. If the lamp lights with the breaker still off, then the outlet is on a different circuit. If the lamp doesn’t light, then it is on the same circuit as the original outlet.

How is the required number of branch circuits determined?

(a) The number of branch circuits required shall be determined in accordance with the following: (1) Lighting, based on 3 volt-amperes per square foot times outside dimensions of the manufactured home (coupler excluded) divided by 120 volts times amperes to determine number of 15 or 20 ampere lighting area circuits.

What is the maximum number of receptacles that can be on any branch circuit in a commercial building?

For commercial occupancies, the NEC requires each receptacle outlet to be calculated at 180VA [220.14(I)]. Therefore, the maximum number of receptacles permitted on a 20A circuit would be 13 (Fig. 1 at right).

Where are electrical receptacles not permitted to be located?

Receptacles are not usually installed in the ceiling because receptacles located more than 5.5 feet (1.7 meters) above the floor cannot be counted as required receptacles. Since no space is available in the walls, floor receptacles must be installed.