You are supervising a new electrician concerning an onboard test of an electrical component using a test rig with flexible cable. The electrician is unsure of the cable conductor color coding. Which of the color coded insulated conductors can only serve as an equipment safety ground and shall not be used as a current carrying conductor?
• Conductor color coding for AC and DC systems on vessels (grounding, neutral, and ungrounded conductors) • Difference between equipment grounding conductor (safety ground) and current-carrying conductors • How green, white/gray, and other colors are typically assigned in marine electrical systems and the NEC
• Which conductor color is specifically reserved for safety grounding and is not permitted to carry normal load current? • What colors are usually associated with neutral versus phase/hot conductors, and are those allowed to carry current? • If a conductor could be used as a normal return path for current, would it still qualify as an equipment safety ground only?
• Identify which insulation color is exclusively assigned to the equipment grounding conductor in standard practice and regulations. • Confirm which colors are commonly used for neutrals and which for hot/phase conductors in marine or NEC-based systems. • Verify that the option you select is a color code that, by rule, shall not be used as a current-carrying conductor under normal operation.
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