Primary Input Electrical Connections - ESAB ESP-150 Manuel D'instruction

SECTION 3
Precautionary measures should be
taken to provide maximum protec-
tion against electrical shock. Be
sure that all power is off by open-
ing the line (wall) disconnect switch
and unplug the power cord to the
unit use proper lock out safety pro-
cedures when making primary elec-
trical connections to the power sup-
ply.
It is of the utmost importance that
the chassis be connected to an ap-
proved electrical ground to prevent
accidental shocking. Take care not
to connect the ground wire to any
of the primary leads.
B. PRIMARY INPUT ELECTRICAL CONNECTIONS
1. A line (wall) disconnect switch, with fuse or circuit breakers, should be pro-
vided at the main power panel. See Fig. 3. The primary power leads should be
insulated copper conductors, and include three power leads and one ground
wire. The wires may be heavy rubber covered cable, or may be run in a solid
or flexible conduit. Refer to Table 1 for recommended input conductors and
line fuse sizes.
FIG 3. Typical Installation - User
Supplied 3 Phase Fused Power
Disconnect Box with Recepticle
and Plug
Table 1. Input Conductor and Line Fuse Size
Input Requirements
Volts Phase
220 3
230 3
380 3
415 3
460 3
575 3
Sizes per National Electrical Code for 75
ambient. Not more than three conductors in raceway or cable. Local
codes should be followed if they specify sizes other than those listed
above.
132
Recommendations
Input & Gnd.
Conductor
A m p s CU/AWG
121 No. 1
116 No. 1
70 No. 4
64 No. 6
58 No. 6
45 No. 6
o rated conductors @ 30
INSTALLATION
Fuse Ratings
/Phase, Amps
150
150
100
90
80
70
o C