What Size Circuit Breaker For Bathroom

Although 100 rated devices typically are not available in sizes this small the permitted rating would still be 50a 16a 30a 46a.

What size circuit breaker for bathroom.

The amperage of a circuit breaker will be marked on its handle. The bulk of breakers used is residential electronic circuits are 20 volts although larger ones can be necessary for more powerful appliances. Ocpd 100 noncontinuous load 125 continuous load 1 00 x 30a 1 25 x 16a 50a. Fifteen ampere receptacles are permitted on 20 ampere multioutlet branch circuits by 210 21 b 3 table 210 21 b 3 210 24 and table 210 24.

This is a bare minimum however and most bathrooms will have at least two receptacles and often as many of four or five. Multiply the value for current by 125 percent to determine the size of the breaker you need for the heater. Rounded up to 50a. The general rule of thumb is that circuit breaker size should be 125 of the ampacity of cable and wire or the circuit which has to be protected by the cb.

In some areas the lighting and receptacles must be on separate circuits so that if a receptacle trips the circuit breaker the lights won t go out. The minimum requirement for outlet receptacles in a bathroom is one gfci protected receptacle served by a 20 amp circuit. To determine the appropriate size of circuit breaker for single phase supply it depends on multiple factors like type of load cable material and environment temperature etc. Therefore a 50a device can be selected.

The washer needs a 20 amp single pole dedicated breaker. The requirement for a 20 ampere branch circuit in the bathroom is in 210 11 c 3 and allows more than one receptacle on this branch circuit. Multiply 30 amps by 220 volts for a total of 6 600 watts. When considering bathroom receptacles keep correct placement in mind.

A 1500 watt heater on a 120 volt circuit thus needs a breaker of 15 6 amps. 15 amps outlet receptacles are rated for 20 amps feed through. Your total wattage now equals 29 750 20 750 6 600 2 400 29 750. Multiply 20 amps by 120 volts for a total of 2 400 watts.

A basic wiring plan for a bathroom includes a 20 amp gfci protected circuit for the receptacles and a 15 amp general lighting circuit for the switches light fixtures and vent fan.