This was extremely helpful , thank you Tonytony.latham wrote:I know I sound stupid but How do you know what amp fuses you need for each device? I went with 10amp for the lighting and vent fan, 15 for the fridge and 30 for solar charger.
You protect your circuit based on the size of the wire, not the anticipated load.
From Bluesea.com:
Generally, circuit protection devices are installed to protect the wiring from overheating during overloads or faults. The simplest approach for selecting a circuit protection device rating is to choose an amperage rating that is equal to or less than the current rating, ampacity of the wire. If the wire ampacity is significantly greater than the load current, as might be with small loads or with wiring of increased size to reduce voltage drop, then a range of circuit protection values between the load requirement and the wire ampacity may be acceptable. Larger ampacity values reduce the probability of nuisance failures and reduce fuse heating; smaller ampacity values provide more conservative protection for the wiring.
T
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