5.3. MMA electrode holder and earth cable connection
(Wiring diagram)
Pay attention to the polarity of wiring before MMA welding. Generally, there are two
connection methods of DC welder: DCEN and DCEP connection.
DCEN: the welding electrode holder is connected to the negative polarity, and the workpiece
is connected to the positive polarity.
DCEP: the electrode holder is connected to the positive polarity, and the workpiece is
connected to the negative polarity.
The operator can choose DCEN based on the base metal and welding electrode. Generally
speaking, DCEP is recommended for basic electrodes (i.e., electrode connected to the
positive polarity), while no special provisions are made for acid electrodes.
1) Ensure that the power switch of the welder is turned off.
2) Insert the cable plug with welding electrode holder into the corresponding socket under
the front panel of the welder and tighten it clockwise.
3) Insert the cable plug with earth clamp into the corresponding socket under the front panel
of the welder and tighten it clockwise.
NOTE! If you want to use long secondary cables (electrode holder and earth cable),
you must ensure that the cross-sectional area of the cable is increased appropriately
in order to reduce the voltage drop due to the cable length.
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