answersLogoWhite
Home Electricity
Electrical Wiring
50 Hertz Residential Electricity

Can a 20A circuit that trips often be changed to a 30A unit if the attaching wire is at least 10 gauge?


Top Answer
User Avatar
Wiki User
2015-08-22 23:46:39
2015-08-22 23:46:39

Yes, the breaker can be changed. The breaker is sized to protect the wire that is connected to it. A #10 conductor is rated at 30 amps. Any load draws what it needs to operate. It is oblivious that if the 20 amp circuit breaker is tripping then the breaker is too small for the connected load. That is probably why the #10 conductor was used in the first place. It happens quite often that if the correct breaker size is not available then a substitute is put in its place. In this case a 20 was used instead of the correct 30 amp breaker.


User Avatar
Wiki User
2015-07-14 16:07:43
2015-07-14 16:07:43

NO! The circuit is being overloaded. Danger of fire will result from just changing the size of the fuse or breaker.

A 30 amp breaker may be used with #10 wiring. #10 is rated for 30 amps. I would be hesitant to do this if the tripping problem is something new though.

Related Questions

User Avatar

the least count of screw gauge is 0.01mm OR 0.001cms..

User Avatar

Yes you can as long as it is feed off of a 20 amp circuit in at least #12 gauge wire.

User Avatar

(1) Re-wire the fridge circuit and/or the range circuit with larger gauge wire. (2) The range should be on its own circuit already (if not, put it on its own circuit like NEC mandates). You could try running a separate circuit just for the fridge too. You only _need_ to use 14 gauge wire, but use at least 12 gauge wire to help reduce voltage drop. (3) If voltage drop is a problem elsewhere in your house, it might be time to look at a service upgrade.

User Avatar

Certainly. Providing that the circuit is capable of safely carrying 20A. But the circuit was most likely put on a 15A fuse for a reason. ie. the circuit can't handle more than 15A. As a general rule, always replace a fuse with another of the same rating. You need to ensure that all wire in the circuit is at least 12 gauge. This is usually not the case in lighting circuits where the wire gauge is typically 14 gauge. Also all switches and outlets on the circuit should be rated 20 A which is non-standard. If you are replacing the 15 with a 20 because the circuit keeps tripping, that is probably a BAD IDEA.

User Avatar

Least count of micrometer screw gauge is found by dividing the pitch of screw gauge by total number of lines on the circular scale.


Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.