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Correct cable & breaker size

monseiur · 2025-06-29 22:57:34

Hi all, Is 4mm sq. cable OK for 16a blue surface mounted round socket - it's for a 180 amp inverter mma/stick welder, or would 6mm be more suitable. The breaker is 32 amp - should it be upgraded to 40 or 50 amp Thanks.

29-06-2025 11:57PM

#1

monseiur

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Hi all, Is 4mm sq. cable OK for 16a blue surface mounted round socket - it's for a 180 amp inverter mma/stick welder, or would 6mm be more suitable. The breaker is 32 amp - should it be upgraded to 40 or 50 amp
Thanks.

Post edited by 2011 on July 7

0

Comments

#2 07-07-2025 10:54AM

2011

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The questions you are asking suggest that this work is beyond your ability. Strongly suggest that you get a professional to look at this.

Example: A 4 mm sq cable can not be adequately protected by an MCB rated at 32A yet you are wondering if the rating should be higher?

2

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