OPERATING & MAINTENANCE INSTRUCTION MANUAL
MODELS 427A (R-1), 428A (R-2), AND 429A (R-3) WELD HEADS
REV. AB
MODEL 514 TUBEMASTER OR 515/516 PIPEMASTER POWER SUPPLY
6
THESE DOCUMENTS, AND THE CONTAINED INFORMATION HEREIN, ARE PROPRIETARY AND ARE NOT TO BE REPRODUCED, USED OR DISCLOSED TO
OTHERS FOR MANUFACTURE OR FOR ANY OTHER PURPOSE, EXCEPT AS SPECIFICALLY AUTHORIZED, IN WRITING, BY MAGNATECH, LLC
4.3
Shock Prevention
Bare conductors or terminals in the output circuit, or ungrounded, electrically live equipment can fatally
shock a person. To protect against shock, have a competent electrician verify that the equipment is
adequately grounded, do not make contact with terminals and parts that are electrically HOT.
Always disconnect the AC power plug before removing the top or bottom panels of the Controller to avoid
electrical shock and the possibility of shorting or grounding the electrical circuitry.
Always disconnect primary power to the power source before removing panels. Do not remove panels from
the power source until the maintenance manual has been read and fully understood, as there may be lethal
voltage present even after the primary power is disconnected. Heed all installation instructions and
warnings given in the Power Source Manual.
Be sure that the 115V line providing electrical service to the Controller is properly grounded. Do not use
"cheater" adaptors to enable the three-prong connector provided to be installed in a two-prong receptacle
without a ground.
The body's electrical resistance is decreased when wet, permitting dangerous currents to flow through the
body. Do not work in damp area without being extremely careful. Stand on dry rubber mats or dry wood
and use insulating gloves when dampness or sweat cannot be avoided. Keep clothing dry.
4.3.1
Installation and Grounding of Electrically Powered Equipment
Electrical equipment must be installed and maintained in accordance with NFPA 70,
National Electrical
Code
, and local codes. A power disconnect switch must be located at the equipment. Check equipment
nameplates for voltage and phase requirements. If only 3-phase power is available, connect single-phase
equipment to only two wires of the 3-phase line. DO NOT CONNECT the equipment-grounding conductor
(lead) to the third live wire of the 3-phase line as this makes the equipment frame electrically HOT, which
can cause fatal shock.
Be sure that all external electrical connections are clean and tight. In particular, the ground-to-work clamp
must make a good electrical contact to assure minimum voltage drop. Adhere to the power source
manufacturer's grounding recommendations. Check for gas and water leaks immediately following cable
hook-up before system is first operated.
If a grounding lead (conductor) is part of the power supply cable, be sure to connect it to a properly
grounded switch box or building ground. If not part of the supply cable, use a separate grounding lead
(conductor). Do not remove a ground prong from any plug. Use correct mating receptacles. Check ground
for electrical continuity before using equipment.
4.3.2
Torch and Work Cables
Inspect cables often for damage to insulation. Replace or repair cracked or worn cables immediately. Do
not use a welding current in excess of rated cable capacity, as the cable will overheat.
4.3.3
Power Source Output Terminals
Do not touch output terminals or make contact with machine while equipment is operating.
Note
: All Magnatech manufactured power sources completely shield the output terminals when the Torch
Cable is connected.