What is mca in electrical terms

Already a member? Close this window and log in. Join Us Close. Are you an Engineering professional? Join Eng-Tips Forums! Join Us! By joining you are opting in to receive e-mail. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Students Click Here. Related Projects. It's been a while so I'd appreciate some help.

I need to size an MCC with about 10 loads, and of course, provide conductors and breakers. Thanks - JM. You may need a larger size for voltage drop or energy savings or whatever but you cannot use a smaller size.

You may see some equipment with a "maximum fuse rating" -- in that case, you MUST use a fuse it can ALSO have a breaker in the circuit, but a breaker alone won't cut the mustard. You can size the wire bigger if you want to or that makes you feel better, but you are not required to per code or UL. LRA locked rotor amps is what a motor will draw with a locked rotor, which will very nearly equal what it will draw during starting.

You use this to calculate motor starting voltage drop. For short runs say, less than feet at v , motor starting probably won't be an issue for you. An excellent synopsis! Thank you. A star for the most useful post of the day. PS -- Your chiller vendor has given you complete data, but your AC unit vendor has not given you complete information, he still owes you MCA data.

You could take a good guess at conductor size based on the FLA info, but you could not be sure until you got MCA from him too. Zira US English. Oliver British. Wendy British. Fred US English. Tessa South African. How to say mca in electrical terms in sign language? Numerology Chaldean Numerology The numerical value of mca in electrical terms in Chaldean Numerology is: 8 Pythagorean Numerology The numerical value of mca in electrical terms in Pythagorean Numerology is: 5.

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