Tweco 500P PowerMaster - Manual (Page 28)

POWERMASTER 500, 500P, 350
INSTALLATION 3-4 Manual No. 0-4749
Rubber-tire mounted equipment shall be grounded to
conform to local and national codes. The grounding
assists in providing protection against line voltage
electrical shock and static shock. The grounding serves
to discharge the static electric charge which tends to build
up on rubber-tire mounted equipment. This static charge
can cause painful shock and lead to the
erroneous conclusion that an electrical fault exists in the
equipment.
If a system ground is not available, consult the
electrical code enforcement body for instructions. The
welding machine should be connected to an adequate
driven ground rod, or to a water pipe that enters the ground
not more than 10 feet (3 meters) from the
machine.
The equipment grounding conductor size is listed in Tables
3-1 and 3-2 as a guide if no local or national code is
applicable. Attach the equipment grounding conductor to
the stud provided on the yoke panel. Determine that the
ground wire size is adequate before the machine is
operated.
3.05 Grounding
The frame of this welding machine should be grounded
for personnel safety, and to assure operation of the
overcurrent protection. The grounding method, and the
equipment grounding conductor size and type shall
conform to local and national codes.
For the National Electrical Code, the equipment
grounding conductor shall be green, green with a yellow
stripe, or bare.
If flexible power cable is used, use a cable assembly which
includes the equipment grounding conductor. If metallic
armored cable or conduit is used, the metal sheathing or
conduit must be effectively grounded per local and
national codes.
VOLTAGE
CHANGEOVER
BOARD
INPUT POWER
TERMINAL
BLOCK
GROUND
STUD
Art # A-06856
Figure 3-6: Ground Stud Location