What is the third action in the grounding sequence?

• A. Open LBF
• B. Ground line side of fuse
• C. Ground load side of fuse
• D. Remove load

Answer: (A)

Opening the LBF is the third action because the priority in a grounding sequence is to isolate the circuit from the energy source before any grounding is applied. The Line Breaker Fuse (LBF) provides the disconnect from the supply, so opening it ensures there is no path for power to re-energize the circuit while you establish safe grounding references. With the source isolated, you can safely ground the line side and then the load side, letting stored or capacitive energy discharge without creating a shock or arc hazard. Grounding before isolating the source could allow energy to feed back or remain hazardous as you touch the circuit, so placing the LBF opening at this point keeps the procedure safer and more effective.