Primary Input Electrical Connections - ESAB ESP-150 Manual De Instrucciones

SecTION 3
Precautionary measures should be taken
to provide maximum protection against
electrical shock. be sure that all power is
off by opening the line (wall) disconnect
switch and unplug the power cord to the
unit use proper lock out safety procedures
when making primary electrical connec-
tions to the power supply.
It is of the utmost importance that the
chassis be connected to an approved
electrical ground to prevent accidental
shocking. Take care not to connect the
ground wire to any of the primary leads.
3.2

PRIMaRY INPuT elecTRIcal cONNecTIONS

1 . A line (wall) disconnect switch, with fuse or circuit breakers, should be
provided 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 3-1. 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
Not more than three conductors in raceway or cable . Local codes should be
followed if they specify sizes other than those listed above .
18
INSTallaTION
Recommendations
Input & gnd.
conductor
amps cu/aWg
121 No . 1
116 No . 1
70 No . 4
64 No . 6
58 No . 6
45 No . 6
rated conductors @ 30
o
fuse Ratings
/Phase, amps
150
150
100
90
80
70
C ambient .
o