74
50 Amp (Optional)
On some larger coaches, more appliances that require more 120-
volt AC power are desired by owners. Availability of 50 amp service
is the best method providing you have 50 amps of incoming power.
For this application a larger circuit breaker box is required as there
are two separate banks of 120-volt AC power on the positive
position. Each positive bank receives a 120 volt wire marked “X” or
“Y” plus a white neutral wire and green/bare ground to complete
circuitry.
Actually these two positive wires added together are 240-volt AC
service, yet serve two separate banks as the external sticker
indicates. A 50
amp main breaker
will distribute
current to separate
banks, verifying 240
volts are present.
There are no 240
volt appliances in
this coach.
X-120 Volt AC
Bare Green Ground
Y-120 Volt AC
White/Neutral Both Positive/hot
If use of a “reducing” adapter or pigtail is needed because 50 amp/
four prong service is not available, several things must be
remembered.
1. A “reducing” adapter prevents you from using 50 amp service as
designed, permitting only 30 amps to enter.
2. Using a “pigtail” adapter may imply a 240-volt AC hookup, which
would cause damage to appliances because 120-volt positive
power would be fed through white/neutral wire.
THIS CONNECTION
IS FOR 120/240
VOLT AC, 3-POLE,
4-WIRE, 60 HZ
50
AMPERE SUPPLY.
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