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Heavy duty 10AWG wire, better protection to the circuit. Wire length: 6 inches 10 gauge wire, Fuse holder dimension: 41x35x15mm Fits for 1A, 2A, 3A,

MCIGICM Fuse Holder 10 Gauge, Inline Fuse Holders 10 AWG Waterproof with 40 Amp Fuse, 3 Pack

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Is this a 20 or 40 amp breaker and can I upgrade it to a 30? : r /AskElectricians

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Would I be able to easily/cheaply add a 40 amp to this? : r/electrical

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Eaton Cutler-Hammer 40 amps Plug In 2-Pole Circuit Breaker - Ace Hardware