Ask Experts Questions for FREE Help !
Ask
    J Denlinger's Avatar
    J Denlinger Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Apr 9, 2013, 11:16 AM
    National electric code online
    Min.wire size for 40Amp breaker with MCA 21.6
    Grady White's Avatar
    Grady White Posts: 1,417, Reputation: 59
    Ultra Member
    		  
    #2

    Apr 12, 2013, 06:37 PM
    Are you asking what size wire to use to a 40 amp breaker serving a piece of equipment with a min. circuit ampacity of 21.6 amps? If so, I have questions before I can answer.
    1. If you only need 21.6 amps, why are you using a 40 amp breaker? A 30 should be more then sufficient.
    2. How long & what kind of wire (copper or aluminum)?
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

National Electric Code Online [ 2 Answers ]

Is it permissible to run romex without a conduit on the ceiling of your garage When the garage is enclosed with sheet rock and the romex will be on the Exposed side of the sheet rock? If a conduit is required will it have to be Metallic?

National Electric Code Online [ 2 Answers ]

Can you feed a 110 volt ac receptical from a 240 volt ac receptical following the NEC code ?

National electric code online [ 1 Answers ]

What is the minimum distance between supports for "free air" low voltage cabling. There is no cable tray. I will have to hang some hooks to support the cable. This is in UT

National electric code online [ 2 Answers ]

Article 450 describes the use of additional ground when wiring for medical offices. My question is, when using MC Green (which has an additional wire that is aluminum) what do you do with that wire and what is the ground wire for?

National Electric Code Online? [ 1 Answers ]

What is the electrical code for a/c ciruits how many a/c can go on a 120v 20a circuit

View more questions Search