AC AND DC GROUNDING REQUIREMENTS
•Connect only to a grounded, permanent wiring system. Ensure there is only one
•If the system has a generator, its
•For all installations, the negative battery conductor should be bonded to the grounding system at one (and only one) point in the system.
•The FX should never be positive grounded.
The equipment ground on each is marked with this symbol: 
Box lug for grounding the FX chassis
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