Bonding connections for metal parts of signs and outline lighting systems are permitted to be made using sheet metal screws.

• A. True
• B. False
• C. Sometimes
• D. Only for hand-tightened screws

Answer: (B)

Bonding metal parts of signs and outline lighting is all about creating a reliable, low-impedance grounding path so that all metal components are at the same electrical potential and any fault current has a safe path to ground. The code requires this bonding to be made with hardware and conductors that are listed or specifically approved for bonding. Sheet metal screws are not designed or listed for bonding work; they can loosen, corrode, or fail to maintain a continuous electrical connection, which can break the grounding path and create a shock or fire hazard. That’s why using sheet metal screws for bonding is not permitted, and approved bonding jumpers, clamps, or other listed connectors should be used to ensure a durable, code-compliant bond.