What is required when installing liquidtight flexible metal conduit in hazardous locations?

When installing liquidtight flexible metal conduit in hazardous locations, the requirement for a bonding jumper is necessary to ensure safety and compliance with electrical codes. The reason a bonding jumper is needed is that it helps to maintain a low-resistance path for fault currents, which is critical in preventing potential electrical hazards. In hazardous locations, the presence of flammable gases, vapors, or dust increases the risk of ignition from electrical faults, so ensuring that all conductive materials are properly bonded reduces this risk.

The bonding jumper connects the conduit to the grounding system of the electrical installation, providing a path for electrical faults to safely dissipate. It eliminates potential differences in voltage that could otherwise create hazards.

Other choices do not meet the safety requirements for installations in hazardous locations: bonding at only one end would not ensure sufficient grounding, and connecting to the ground only misses the additional safety provided by a bonding jumper. Therefore, ensuring a comprehensive bonding approach is essential for preventing dangerous conditions in areas where explosive atmospheres may exist.