Manual

A-5
INSTALLATION
A-5
To connect the "pig-tail" cables to the Converter:
1. Stand the Converter vertically on its rear handle
and skid to gain access to the bottom stud cov-
ers, then remove the two 0.25"(6.3mm) screws
securing each cover and fold out the cover insula-
tion.
2. Route the appropriate "pig-tail" cable lug ends
under the skid rail (for strain-relief) through the
desired front and/or rear corner channels to the
exposed 0.5"(13mm) stud, and remove the flange
nut with a .75"(19mm) wrench. Note: Input supply
cable(s) must connect through "INPUT +" labeled
channels, and output weld cable(s) must connect
through "ELECTRODE +" labeled channels.
3. Slip the "pig-tail" cable lug(s) over the stud and
re-secure the flange nut, making sure that lug(s)
nowhere touch any sheetmetal of the stud hous-
ing, then fold back the cover insulation and
replace the stud cover.
ELECTRIC SHOCK can kill.
Be sure to follow the safety practice to
use the female connector on the cable
which would normally be electrically
"hot" (supply lead) if disconnected when
the system is energized, and the male on
the normally "cold" (load lead) side. If
practical, shut off power before connecting or dis-
connecting terminals.
------------------------------------------------------------------------
WORK CONNECTION
Each Converter in the Multi-Weld System must have its
individual “Work” lead connected (clipped) to work. The
#3 AWG (27mm
2
) Work clip lead must have clean metal
connection to the work to complete the DC input supply
and output power circuits of the RED-D-ARC MX350.
ELECTRIC SHOCK can kill.
Do not disconnect the Work clip lead
without first switching OFF the
Converter panel switch. Failure to do
so will allow the work lead clip to be
electrically "hot" to work, and "hot" to
the electrode, through the circuit of
the Converter for about 5 seconds until the input
contactor opens.
------------------------------------------------------------------------
CASE GROUNDING
As shipped, the case of the RED-D-ARC MX350 is isolat-
ed from all of the DC input and output welding terminals,
and is equipped with a grounding terminal screw (.31” /
7.9mm) marked with the symbol located on the bot-
tom rear of the Base assembly. ( Refer to the bottom
view figure.) In order to comply with CSA and UL case
grounding specifications, this terminal is provided for
connection to weldment work which must be properly
grounded per methods meeting local and national electri-
cal codes. Refer to “Saftey in Welding, Cutting and Allied
Processes”, ANSI Z49.1 (US) and W117.2 (Canada).
Since any case fault would only involve the DC welding
circuit, the size of the grounding lead should have the
capacity to ground the potential fault current without
burning open. Use at least #6AWG (13mm
2
), but need
not exceed the size of the input cable suppling thew
RED-D-ARC MX350.
Connect the RED-D-ARC MX350 grounding lead to the
work piece separately from the Work clip. If the same clip
is used for both ground and work connection, the RED-
D-ARC MX350 case will be electrically “hot” to the work if
the clip is removed without first switching OFF the panel
switch. ( Refer to the Work clip WARNING above).
WARNING
WARNING
RED-D-ARC MX350