Figure 5-12. - Checking a switch in the OFF position for proper operation.

safe habits. Remember that getting too friendly with electricity can be a shocking experience.

Circuit Breaker

A circuit breaker operates much the same as a switch-the breaker is either ON or OFF. The neon tester lead is placed on the neutral bar and the other lead is placed on the screw terminal of the circuit breaker (fig. 5-18). If the breaker is good, the neon tester will light when the breaker is in the ON position and will not light when the breaker is in the TRIPPED position.

Figure 5-13. - Checking a switch in the ON position for proper operation.

If the neon tester remains lighted in both positions, the breaker is shorted and should be replaced. If the neon tester does not light in either position, the circuit breaker is open and should be replaced. Remember to reset the circuit breaker.

Figure 5-14. - Technique for determining which wire is hot.