What is the minimum size bonding conductor required for metal parts associated with a neon sign, if the neon transformer output voltage is 7,500 volts?

The correct answer is based on the requirements specified in the National Electrical Code (NEC) for bonding conductors in electrical systems, particularly those related to neon signs. When dealing with neon signs powered by transformers, it is essential to ensure that all metal parts, including the neon tubing and supports, are properly bonded to facilitate safety.

For a neon transformer output voltage of 7,500 volts, the Code dictates certain minimum sizes for bonding conductors, taking into account the maximum output voltage and the potential for electric shock or fire hazards. Table 250.122 of the NEC provides guidance on bonding conductor sizes in relation to the rating of the overcurrent device.

When the output voltage is this high, the size of the bonding conductor varies based on the potential electrical resistance and the need to maintain a safe path for fault currents, thereby protecting individuals and equipment. However, the minimum size for the bonding conductor in this scenario is determined by other standards present in the NEC.

In this context, selecting 14 AWG as the bonding conductor ensures compliance with these safety standards while addressing the requirements for the specific application involving a high-voltage neon sign. This size ensures that there is an adequate capacity to manage fault currents, thereby minimizing the risk of electric shock