Line disconnect switch -5, Power cables -5, Line disconnect switch -5 power cables -5 – Hypertherm HT4001 Plasma Arc Cutting System User Manual
Page 45: Power cables
12-99
PRE-INSTALLATION
HT4001
Instruction Manual
3-5
Line Disconnect Switch
The line disconnect switch serves as the supply voltage disconnecting (isolating) device. Install this switch on a
wall near the power supply for easy accessibility by the operator. The line disconnect switch must be installed
by qualified personnel following all applicable local and national codes. The switch should:
• Isolate the electrical equipment and disconnect all live conductors from the supply voltage when in “OFF”
position
• Have one “OFF” and one “ON” position clearly marked with “O” (OFF) and “I” (ON)
• Have an external operating handle capable of being locked in the “OFF” position
• Contain a power operated mechanism that serves as an emergency stop
• Have slow-blow fuses installed for the proper breaking capacity (see table on pg.3-4)
Power Cables
Wire sizes vary based on the distance of the receptacle from the main box.
HT4001 Power Supplies
The wire sizes listed below are taken from the National Electric Code 1990 handbook, table 310.16. Use a
4-conductor (3 conductor w/ground) input power cable with a conductor temperature rating of 60° C (140° F) or
90° C (194° F) according to the following requirements:
Water Chiller
For information on cable sizes for the water chiller, refer to its instruction manual (802410 Model D).
H401 Slave
For information on cable sizes for the H401 slave, refer to its instruction manual (800410).
t
u
p
n
I
e
g
a
t
l
o
V
e
g
a
t
l
o
V
e
g
a
t
l
o
V
e
g
a
t
l
o
V
e
g
a
t
l
o
V
)
G
W
A
r
o
M
C
M
(
e
z
i
S
e
l
b
a
C
d
e
d
n
e
m
m
o
c
e
R
)
F
°
0
4
1
(
C
°
0
6
r
o
f
d
e
t
a
r
)
F
°
0
4
1
(
C
°
0
6
r
o
f
d
e
t
a
r
)
F
°
0
4
1
(
C
°
0
6
r
o
f
d
e
t
a
r
)
F
°
0
4
1
(
C
°
0
6
r
o
f
d
e
t
a
r
)
F
°
0
4
1
(
C
°
0
6
r
o
f
d
e
t
a
r
)
G
W
A
(
e
z
i
S
e
l
b
a
C
d
e
d
n
e
m
m
o
c
e
R
)
F
°
4
9
1
(
C
°
0
9
r
o
f
d
e
t
a
r
)
F
°
4
9
1
(
C
°
0
9
r
o
f
d
e
t
a
r
)
F
°
4
9
1
(
C
°
0
9
r
o
f
d
e
t
a
r
)
F
°
4
9
1
(
C
°
0
9
r
o
f
d
e
t
a
r
)
F
°
4
9
1
(
C
°
0
9
r
o
f
d
e
t
a
r
t
n
e
r
r
u
C
g
n
i
t
a
R
g
n
i
t
a
R
g
n
i
t
a
R
g
n
i
t
a
R
g
n
i
t
a
R
C
A
V
0
0
2
e
t
o
N
e
e
S
*
G
W
A
0
/
4
s
p
m
a
0
6
2
C
A
V
0
2
2
e
t
o
N
e
e
S
*
0
/
4
G
W
A
s
p
m
a
0
4
2
C
A
V
0
4
2
M
C
M
0
5
2
0
/
3
G
W
A
s
p
m
a
5
1
2
C
A
V
0
8
3
G
W
A
0
/
2
1
G
W
A
s
p
m
a
5
4
1
C
A
V
0
0
4
G
W
A
0
/
2
1
G
W
A
s
p
m
a
5
4
1
C
A
V
5
1
4
G
W
A
0
/
1
2
G
W
A
s
p
m
a
5
2
1
C
A
V
0
4
4
G
W
A
0
/
1
2
G
W
A
s
p
m
a
5
2
1
C
A
V
0
8
4
G
W
A
1
3
G
W
A
s
p
m
a
0
1
1
C
A
V
5
7
5
G
W
A
2
4
G
W
A
s
p
m
a
5
9
C
A
V
0
0
6
G
W
A
2
4
G
W
A
s
p
m
a
5
9
Note:
Use the smaller diameter 4/0 AWG
cable (1.6"/40.6 mm) rated for 90°
C (194° F) rather than an
equivalent larger diameter cable
(350 MCM, 2.05"/52 mm) rated for
60° C (140° F) to accommodate
the bend radius necessary to
connect incoming power cable to
the power supply.