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Do-It-Yourself (DIY) Question & Answer Forum
Sizing a Circuit Breaker
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<blockquote data-quote="Gary25" data-source="post: 556762" data-attributes="member: 36870"><p>I have 254V feeding a 50W anti-condensation heater via a 3c x 2.5mm cable. The load is approximately 0.196A (196mA). </p><p>Can anyone please advise what size of MCB I should use for this? </p><p>I feel that a 250mA or 300mA circuit breaker would probably be on the small side, and I'm thinking of something more like 2A or even 5A, given the size of the cable, but could that lead to damaging the heater?</p><p>The cable run is approx 130metres long.</p><p></p><p>Any help would be appreciated.</p><p></p><p>Thanks</p></blockquote><p></p>
[QUOTE="Gary25, post: 556762, member: 36870"] I have 254V feeding a 50W anti-condensation heater via a 3c x 2.5mm cable. The load is approximately 0.196A (196mA). Can anyone please advise what size of MCB I should use for this? I feel that a 250mA or 300mA circuit breaker would probably be on the small side, and I'm thinking of something more like 2A or even 5A, given the size of the cable, but could that lead to damaging the heater? The cable run is approx 130metres long. Any help would be appreciated. Thanks [/QUOTE]
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Sizing a Circuit Breaker
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