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MACHINE GROUNDING
According to the United States National Electrical
Code, the frame of this portable generator is not
required to be grounded and is permitted to serve as
the grounding means for cord connected equipment
plugged into its receptacles.
Some state, local or other codes or unusual operating
circumstances may require the machine frame to be
grounded. It is recommended that you determine the
extent to which such requirements may apply to your
particular situation and follow them explicitly. A
machine grounding stud marked with the symbol
is provided on the welding generator frame foot.
(If an older portable welder does not have a grounding
stud, connect the ground wire to an unpainted frame
screw. See Figure A.2.
In general, if the machine is to be grounded, it should
be connected with a #8 or larger copper wire to a solid
earth ground such as a metal water pipe going into the
ground for at least ten feet and having no insulated
joints, or to the metal framework of a building which
has been effectively grounded. The U.S. National
Electrical Code lists a number of alternate means of
grounding electrical equipment.
Do not ground the machine to a pipe that carries explo-
sive or combustible material.
When the SA-250 is mounted on a truck or a trailer, the
machine generator ground stud MUST be securely
connected to the metal frame of the vehicle. See
Figure A.2. The ground stud is marked with the ground
symbol.
AUXILIARY POWER RECEPTACLES,
PLUGS, AND HAND-HELD EQUIPMENT
The AC auxiliary power, supplied as a standard, has a
rating of 3.0 kVA of 115/230V AC (60 hertz).
With the 3.0 kVA, 115/230V AC auxiliary power, one
115V duplex and one 230V duplex grounding type
receptacle are provided. The circuit is protected with
circuit breakers.
The rating of 3.0 kVA permits a maximum continuous
current of 13 amps to be drawn from the 230 volt
duplex receptacle. Or a total of 26 amps can be drawn
from the 115 volt duplex receptacle. The 115 volt
duplex receptacle has a configuration which permits 15
amps to be drawn from either half of the receptacle.
The total combined load of all receptacles is not to
exceed 3.0 kVA.
For further protection against electric shock, any elec-
trical equipment connected to the generator recepta-
cles must use a three-blade, grounded type plug or an
Underwriter's Laboratories (UL) approved double insu-
lation system with a two-blade plug. Lincoln offers an
accessory plug kit that has the right type of plugs. See
the
Accessories
section of this manual for details.
If you need ground fault protection for hand-held equip-
ment, refer to the
Accessories
section of this manual
for the GFCI Receptacle kit.
CIRCUIT BREAKERS
SA-250 welders are equipped with cir-
cuit breakers on the 115 and the 230
volt receptacles for overload protec-
tion. Under high heat a breaker may
tend to trip at lower loads than it would normally.
Operation with high ambient temperatures may cause
the breakers to trip at lower than normal loads.
Never bypass the circuit breakers. Without overload
protection, the SA-250 could overheat and/or cause
damage to the equipment being used.
INSTALLATION
A-7 A-7
SA-250
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CAUTION
1
FIGURE A.2 - GROUND STUD LOCATION
WARNING
1. GROUND STUD