HI-POT TESTING
HI-POT TESTING
HI-POT TESTING
HI-POT TESTING
HI-POT TESTING
(MANUFACTURING COMPANIES ONLY)
1) Turn on all circuit breakers in panel.
2) Make sure all power supplies including inverter and gen-
erator are off. If there are other power supplies present, and
they are electrically connected to the RV system by means
of a transfer switch, refer to the transfer switch hi-pot in-
structions before proceeding further. See Note.
FIG. C - BRANCH CIRCUIT CONNECTIONS
FIG. D - CIRCUIT BREAKER CONNECTIONS
GROUND
BAR
NEUTRAL BAR
BRANCH CIRCUIT
TO POWER
CONVERTER
CIRCUIT BREAKER
REQUIRED
HOLD-DOWN
BRACKET
wire entry holes; they may be installed from the outside or
inside. The pie-shaped fingers in the bushings bend to allow
wiring to pass, yet fill in the remainder of the space, com-
plying with Canadian requirements.
VI. LABELS
Install labels for 120 volt and 12 volt circuit identification.
Labels may be preprinted or blank labels may be filled in by
the installer. Labels must be visible after the deadfront is
attached. 120 volt labels are intended to be attached to the
circuit breaker. 12 volt labels are intended to be attached
above and below the fuse openings. Labels should not be
attached to the front cover, as the cover can be removed
and lost.
3) Turn off or disconnect all appliances that would be dam-
aged by the hi-pot test.
4) Connect the hi-pot leads to the powercord plug: one lead
to the hot and neutral prongs, the other lead to the ground
prong.
5) Energize the hi-pot and conduct test. This will hi-pot test
for leakage (short) between the current-carrying conduc-
tors and the ground in the entire RV 120 VAC circuitry. It
will also test the powercord itself. Turn off hi-pot.
6) If hi-pot test fails there is a short in the system. The next
step is to isolate the location of the short. Turn off the main
breaker in panel and hi-pot test again. If test fails, fault is
between the cord plug and the panel. Test cord for shorted
plug. If second test passes, turn on main breaker, and turn
off all branch breakers except one. Retest each branch
circuit individually until short circuit is isolated. Repair fault
and retest. Hi-pot test is successful when there are no more
fault indications.
NOTE: If the hi-pot test is performed from the plug on the
powercord, and there is a transfer switch present, the test
may only hi-pot the cord itself; it may not test the RV wiring
beyond the switch. In this case the hi-pot transfer switch
should be performed from either the transfer switch output,
or from the main panel, as well as from the plug to test the
cord itself.
FIG. E - DETAILS OF BREAKER HOLD-DOWN INSTALLATION
