Protecting the feeder | on ElectriciansForums

Discuss Protecting the feeder in the UK Electrical Forum area at ElectriciansForums.net

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This is a solar tie in generating 22 amps max current, hence the 25a/2p breaker on the subpanel but is there any reason the breaker feeding the subpanel has to be an 80a/2p? Can it be a 50a/2p?
 

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