xformer
Senior Member
- Location
- Dallas, Tx
- Occupation
- Master Electrician
Does the N.E.C. specify that the ampere rating of a switch on a branch circuit match the rating of the overcurrent protection of the circuit? If so, where?
Switch Ratings....
- Thread starter xformer
- Start date
- Status
- Location
- Massachusetts
No.......................
mdshunk
Senior Member
- Location
- Right here.
The switch is sized per the controlled load, without regard to the overcurrent protection of the circuit.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
But, don't let that make you think you can also use a smaller conductor.mdshunk said:
And to back up all of the above statements........
404.14 Rating and Use of Snap Switches.
Snap switches shall be used within their ratings and as indicated in 404.14(A) through (E).
FPN No. 1: For switches on signs and outline lighting, see 600.6.
FPN No. 2: For switches controlling motors, see 430.83, 430.109, and 430.110.
(A) Alternating-Current General-Use Snap Switch. A form of general-use snap switch suitable only for use on ac circuits for controlling the following:
(1) Resistive and inductive loads, including electric-discharge lamps, not exceeding the ampere rating of the switch at the voltage involved
(2) Tungsten-filament lamp loads not exceeding the ampere rating of the switch at 120 volts
(3) Motor loads not exceeding 80 percent of the ampere rating of the switch at its rated voltage
404.14 Rating and Use of Snap Switches.
Snap switches shall be used within their ratings and as indicated in 404.14(A) through (E).
FPN No. 1: For switches on signs and outline lighting, see 600.6.
FPN No. 2: For switches controlling motors, see 430.83, 430.109, and 430.110.
(A) Alternating-Current General-Use Snap Switch. A form of general-use snap switch suitable only for use on ac circuits for controlling the following:
(1) Resistive and inductive loads, including electric-discharge lamps, not exceeding the ampere rating of the switch at the voltage involved
(2) Tungsten-filament lamp loads not exceeding the ampere rating of the switch at 120 volts
(3) Motor loads not exceeding 80 percent of the ampere rating of the switch at its rated voltage
- Status