Grounded Conductor, Direct Current (dc) : A current-carrying conductor connected to the side of the power source that is intentionally maintained at boat ground potential
NFPA 302 Fire Protection Standard for Pleasure and Commercial Motor Craft, 1998 ed. https://www.nfpa.org/assets/files/AboutTheCodes/30 2/302-A2003-rop.PDF, (Std: Fr Prac for Pleasure and Comm Motor Craft - Amer) {292 NFC}