SAFETY SHORTING PROBE
A representative shorting probe is shown in figure 1-4. An approved shorting probe is shown in
NAVSEA 0967-LP-000-0100, EIMB, General, Section 3.
Figure 1-4.Representative safety shorting probe.
Capacitors and cathode-ray tubes may retain their charge for a considerable
period of time after having been disconnected from the power source.
Always assume there is a voltage present when working with circuits having
high capacitance, even when the circuit has been disconnected from its power
An approved type of shorting probe should be used to discharge capacitors and
cathode-ray tubes individually.
When using the safety shorting probe, always be sure to first connect the test clip to a good ground
(if necessary, scrape the paint off the grounding metal to make a good contact). Then hold the safety
shorting probe by the insulated handle and touch the probe end of the shorting rod to the point to be
shorted out. The probe end is fashioned so that it can be hooked over the part or terminal to provide a
constant connection by the weight of the handle alone. Always take care not to touch any of the metal
parts of the safety shorting probe while touching the probe to the exposed "hot" terminal. It pays to be
safe; use the safety shorting probe with care.
Some equipments are provided with walk-around shorting devices, such as fixed grounding studs or
permanently attached grounding rods. When that is the case, the walk-around shorting devices should be
used rather than the safety shorting probe.
Q-12. What tool is used to de-energize capacitors in a circuit that has been disconnected from its power
WORKING ON DE-ENERGIZED CIRCUITS
When any electronic equipment is to be repaired or overhauled, certain general safety precautions
should be observed. They are as follows: