4
Wiring
ELECTRIC SHOCK HAZARD. Disconnect all power
before installing or servicing heater. Failure to do so
could result in personal injury or property damage.
Heater must be effectively grounded in accordance
with the National Electrical Code, NFPA 70.
1. Use heater only on the voltage and frequency specified
on the nameplate.
2. All wiring should be done in accordance with local codes
and the National Electrical Code by a qualified person.
3 Branch circuit wire for connection to heater must be at
least 90°C wire.
4. The top access panel is secured by 4 screws that must
be loosened to gain access.
5. A ground terminal is provided near the power terminal
board. The ground wire should be connected before oth-
er connections are made.
6. Refer to Chart A for proper size “SO” grade cable.
7. A proper strain relief must be used with “SO” grade ca-
ble.
8. Dragon heaters are factory pre-wired for 3-phase delta
operation. Some units can be converted to single phase
operation by changing the wiring. Refer to Chart Afor
those heaters that can be converted to single phase. The
appropriate wiring diagram is also located on the back of
the wiring compartment cover.
Table 1 - Specifications
Model
kW
Volts
Phase
Wiring Dia.
No.
Amps
Wire Size
25’ Cord Set
PCN
Optonal Plugs
Locking Type
Non-Locking
Type
DRA-07-83
7.5
208
1
1A
36.3
8/3
PLC-2508-3
———
PGN-6-50
DRA-07-83
7.5
208
3
1
21.0
10/4
PLC-2510-4
PGL-15-30
PGN-15-50
DRA-07-23
5.6
208
1
1A
27.1
10/3
PLC-2510-3
PGL-15-30
PGN-6-50
DRA-07-23
5.6
208
3
1
15.7
12/4
PLC-2512-4
PGL-15-20
PGN-15-20
DRA-07-23
7.5
240
1
1A
31.5
8/3
PLC-2508-3
———
PGN-6-50
DRA-07-23
7.5
240
3
1
18.2
12/4
PLC-2512-4
PGL-15-20
PGN-15-20
DRA-10-83
9.75
208
1
1A
47.1
6/3
PLC-2506-3
———
PGN-6-50
DRA-10-83
9.75
208
3
1
27.2
8/4
PLC-2508-4
PGL-15-30
PGN-15-50
DRA-10-23
7.3
208
1
1A
35.4
8/3
PLC-2508-3
———
PGN-6-50
DRA-10-23
7.3
208
3
1
20.4
10/4
PLC-2510-4
PGL-15-30
PGN-15-50
DRA-10-23
9.75
240
1
1A
40.8
6/3
PLC-2506-3
———
PGN-6-50
DRA-10-23
9.75
240
3
1
23.6
10/4
PLC-2510-4
———
PGN-15-50
DRA-15-83
15
208
3
1
41.8
6/4
PLC-2506-4
———
PGN-15-50
DRA-15-23
11.2
208
3
1
31.4
8/4
PLC-2508-4
———
PGN-15-50
DRA-15-23
15
240
3
1
38.3
6/4
PLC-2506-4
———
PGN-15-50
DRA-15-43
15
480
1
2A
31.5
8/3
PLC-2508-3
PGL-3763C
———
DRA-15-43
15
480
3
2
18.2
12/4
PLC-2512-4
PGL-16-30
———
DRA-15-93
15
600
1
2A
25.2
10/3
PLC-2510-3
PGL-3763C
———
DRA-15-93
15
600
3
2
14.6
14/4
PLC-2514-4
PGL-17-30
———
DRA-20-23
15
208
3
3
41.8
6/4
PLC-2506-4
———
PGN-15-50
DRA-20-23
20
240
3
3
48.3
4/4
PLC-2504-4
———
PGN-15-50
DRA-20-43
20
480
1
4A
41.9
6/3
PLC-2506-3
PGL-3763C
———
DRA-20-43
20
480
3
4
24.4
10/4
PLC-2510-4
PGL-17-30
———
DRA-20-93
20
600
1
4A
33.5
8/3
PLC-2508-3
PGL-3763C
———
DRA-20-93
20
600
3
4
19.4
12/4
PLC-2512-4
PGL-17-30
———
DRA-30-43
30
480
3
4
36.3
6/4
PLC-2506-4
PGL-3764C
———
DRA-30-93
30
600
3
4
29.1
8/4
PLC-2508-4
PGL-17-30
———
Power Cord based on 600V Hard Service Cord Rated 90°C
Plug selection is based on using Chromalox Cable Kits