46 CFR § 113.43-5
Power supply
April 15, 2021
Each steering failure alarm system must be supplied by a circuit that:
(a) Is independent of other steering gear system and steering alarm circuits;
(b) Is fed from the final emergency power source through the emergency distribution panel in the wheelhouse, if installed; and
(c) Has no overcurrent protection except short-circuit protection by an instantaneous fuse or circuit breaker rated or set at 400 to 500 percent of:
(1) The current-carrying capacity of the smallest alarm system interconnecting conductors; or
(2) The normal load of the system.