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Blown fuses are a fact of life around an RV's 12V system, so it pays to keep the right size on hand. These Bussmann AGC-20 fuses are the common glass tube style used in automotive and RV fuse blocks, rated to open fast on a 20 amp overload before wiring or accessories get damaged.
Good insurance to carry in the spares box -- a fuse is a lot cheaper than the circuit it protects.
