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Hot stick probes can be used to discharge any capacitance in the item under test as a further safety
precaution. A hot stick is a non-conducting rod about two feet long with a metal probe at the end which is
connected to a wire. To discharge the device under test, two hot sticks are required. First connect both probe
wires to a good earth ground. Then touch one probe tip to the same place the return lead was connected.
While holding the first probe in place, touch the second probe tip to the same place where the high voltage
lead was connected.
6. Test Station
Location
Select an area away from the main stream of activity which employees do not walk through in performing
their normal duties. If this is not practical because of production line flow, then the area should be roped off
and marked for HIGH VOLTAGE TESTING. No employees other than the test operators should be allowed
inside. If benches are placed back-to-back, be especially careful about the use of the bench opposite the test
station. Signs should be posted: "DANGER - HIGH VOLTAGE TEST IN PROGRESS - UNAUTHORIZED
PERSONNEL KEEP AWAY."
Power
Voltage-Hipot Test Equipment must be connected to a good ground. Be certain that the power wiring to the
test bench is properly polarized and that the proper low resistance bonding to ground is in place.
Power to the test station should be arranged so that it can be shut off by one prominently marked switch
located at the entrance to the test area. In the event of an emergency, anyone can cut off the power before
entering the test area to offer assistance.
THE MAINS PLUG IS USED AS THE DISCONNECTING DEVICE AND SHALL REMAIN
READILY OPERABLE. THE SOCKET-OUTLET SHALL BE INSTALLED NEAR THE
EQUIPMENT AND SHALL BE EASILY ACCESSIBLE.
Do not replace the power supply cord with an improperly rated cord. For North
American: A UL listed and CSA labeled power cord must be used with the tester in
the United States and Canada. The power cord must include a NEMA5-15 style male
plug, SVT or SJT cord sets, and be rated for at least 125VAC, 10A, number 16 gauge (or 125VAC, 15A, number
14 gauge) wire or larger, and the length of the cord does not exceed 2 m must be used. For European: A
certified power supply cord not lighter than light PVC sheathed flexible cord according to IEC 60227,
designation H03 VV-F or H03 VVH2-F (for equipment mass not exceeding 3 kg), or H05 VV-F or H05 VVH2-F2
(for equipment mass exceeding 3 kg), and be rated for at least 3G 0.75 mm² (for rated current up to 10 A) or
3G 1.0mm² (for rated current over 10 A up to 16 A) wire or larger, and the length of the cord does not
exceed 2 m must be used.
Work Area
Perform the tests on a non-conducting table or workbench, if possible.
There should not be any metal in the work area between the operator and the location where products being
tested will be positioned.
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