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Q: What is the max number of luminaries that can be installed on a 20-amp 277-volt branch circuit?
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What is the minimum branch circuit wire size that may be installed in a dwelling?

14 awg


What is the minimum branch-circuit wire size that may be installed in a dwelling?

14 awg


What is the minium branch -circuit wire size that may be installed in a dwelling?

Under modern code, the 14 AWG copper conductor is the smallest branch-circuit wiring size, based upon 15A overcurrent protection.


What is the exception to the minimum branch-circuit wire size that can be installed in a dwelling?

Low energy applications can be smaller than the 14 AWG branch wiring. Examples of this are the wiring for door bells, thermostats, intercoms and communications.


What is the minimum branch-circuit wire size installed in a dwelling?

The minimum size home wiring is #14 AWG, the rating for that size wire is 15 amps.


Can you run an extra set of wires off a 20 amp breaker?

No, this is stated very clearly in the electrical code. Only one branch circuit is to be allowed connected to each individual circuit breaker no matter what the amperage is. If a new branch circuit is installed and there are no spare breakers then most distribution panels have the ability to let tandem breaker be installed in it. Tandem breakers have two terminals and two handles and have the ability to fit into a single slot in the distribution panel.


How can you identify the branch parallel circuit with the what will have the least amount of current flow?

In a DC circuit, it's the branch with the largest resistance. In an AC circuit, it's the branch with the largest magnitude of impedance.


What determines the current in each branch of parallel of circuit?

The resistance of the component on that branch of the circuit, if the resistance is higher less of a proportion of the total current of the circuit will travel through that branch, however, if the resistance is low a higher proportion of the current will travel through that branch of the circuit. The voltage through each branch stays the same.


What determines the current in each branch of a parallel circuit?

The resistance of the component on that branch of the circuit, if the resistance is higher less of a proportion of the total current of the circuit will travel through that branch, however, if the resistance is low a higher proportion of the current will travel through that branch of the circuit. The voltage through each branch stays the same.


What happens to an ammeter when there is a break in a circuit?

An ammeter reads the current that is flowing through a branch of a circuit. If there is a break within that same branch of the circuit, current will not be able to flow through that branch of the circuit as it forms an incomplete loop, so the ammeter will read 0 A of current. If there is a break in a circuit in a branch that is not connected to the ammeter however, the ammeter will give a higher reading of the current. This is assuming that the break in the other branch does not short out the branch with the ammeter attached, and that the circuit can still form a complete loop without that branch.


What type of an electrical circuit has more than one current branch?

A parallel circuit is an electrical circuit that has more than one current branch.


What determines the current ine each branch of parallel of circuit?

The resistance of the component on that branch of the circuit, if the resistance is higher less of a proportion of the total current of the circuit will travel through that branch, however, if the resistance is low a higher proportion of the current will travel through that branch of the circuit. The voltage through each branch stays the same.