Longevity FORCECUT 50i - Manual (Page 13)

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Identifying the Ground wire
Caution: The machine may appear to operate with an incorrectly connected ground
wire, but it will not operate properly. Selecting the correct ground wire is important
for proper machine operation and personnel safety.
Ground wires on LONGEVITY® Welding machines are usually one of the following
colors:

The ground wire is a dark green with a yellow stripe. The wire may also be just
SOLID GREEN.
Clean the ends of the wires to more easily distinguish the colors. The best and safest
way to determine which wire is ground is to measure the resistance between the
machine chassis and the selected wire, using an ohmmeter. Another method is to
check the continuity between the chassis and the wire, using a continuity meter. If
the selected wire is ground, the connection between the chassis and the wire will
cause the meter to illuminate. If, for any reason, you cannot visually detect the
ground wire or do not feel comfortable with your selection, ask an electrician for
help.
Identifying the hot wire
For 220vac service, both the brown and blue wire are positive wires. As you may
know, 220vac features two hot wires. If you are wiring to 220vac, your blue and
brown wires are both hot. The green with yellow or SOLID GREEN is the
ground. Remember, any hot wire can be attached to either hot leg on the plug.
Note: Hot Wires May also be WHITE and BLACK if a GREEN WIRE is one of
the three wires. Therefore, GREEN is ALWAYS GROUND.
NOTE: LONGEVITY® recommends a 50 AMP breaker on 220v, but you can
operate on 30AMP breaker.