SECTION 3 Installation
ESP-400C Plasma Power Source
3-3
3.4.1 Primary Power
ESP-400C is a 3-phase unit. Input power must be
provided from a line (wall) disconnect switch that
contains fuses or circuit breakers in accordance to
local or state regulations.
Recommended input conductor and line fuse sizes:
Rated Load
Volts Amperes
Input and
Ground
conductor*
CU/AWG
Time delay
Fuse size
(amperes)
400
460
575
138
120
96
4/0
3/0
1/0
200
150
125
*Sizes per National Electrical Code for a 90 °C rated
copper conductors @ 40 °C ambient. Not more than
three conductors in raceway or cable. Local codes
should be followed if they specify sizes other than those
listed above.
(V arc) x (I arc) x 0.688
Input current =
(V line)
NOTICE
Dedicated power line may be necessary.
ESP-400C is equipped with line voltage
compensation but to avoid impaired performance
due to an overloaded circuit, a dedicated power
line may be required.
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