What is the recommended practice for grounding before connecting hoses?

What is the recommended practice for grounding before connecting hoses?

• A. Check color of wires.
• B. Verify grounding with bonding strap and solid ground per SOP.
• C. Just assume it's grounded.
• D. Ground after disconnecting hoses.

Answer: (B)

Grounding and bonding before transferring flammable liquids is essential to prevent static electricity from generating a spark. The recommended practice is to verify grounding by using a bonding strap to connect all equipment to a solid ground, and to confirm this bond meets the SOP requirements. This matters because the bonding strap creates a continuous, low-impedance path so that the equipment and the extinguisher foam system share the same electrical potential. A solid ground ensures the entire transfer setup is at earth potential, reducing the risk of a static discharge during movement or flow of the foam. Relying on wire color to prove grounding isn’t reliable, and assuming the system is grounded is dangerous. Grounding after disconnecting hoses would leave the system unbonded during transfer, which defeats the purpose of the safety bond. Following the SOP ensures the grounding procedure is standardized, tested, and documented, so any issues can be addressed before transfer begins.

Grounding and bonding before transferring flammable liquids is essential to prevent static electricity from generating a spark. The recommended practice is to verify grounding by using a bonding strap to connect all equipment to a solid ground, and to confirm this bond meets the SOP requirements. This matters because the bonding strap creates a continuous, low-impedance path so that the equipment and the extinguisher foam system share the same electrical potential. A solid ground ensures the entire transfer setup is at earth potential, reducing the risk of a static discharge during movement or flow of the foam.

Relying on wire color to prove grounding isn’t reliable, and assuming the system is grounded is dangerous. Grounding after disconnecting hoses would leave the system unbonded during transfer, which defeats the purpose of the safety bond. Following the SOP ensures the grounding procedure is standardized, tested, and documented, so any issues can be addressed before transfer begins.