What cable? T&E?, SWA?, MICC?
How long is it?
What type of MCB? B? C? 1? 2?
How is the cable run? bunched with others? in thermal insulation? in a hot place?
Any RCD protection?
What earthing arrangements? TNS? TT? TNC-S?
Garage internal to the house, or separate?
I take it this cable runs into a submain board?
its t and earth running to external garage in conduit under drive running into garage cu rcd protected hope this helps its fed from main board in house it was a 30 amp rewirable but when hot tub was installed they up rated to 40 never had any tripping the cable runs approx 7 mtrs
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