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THERMOSTAT WIRING DIAGRAM
FUSED DISCONNECT
OR CIRCUIT BREAKER
| L1 L2 !
I
m
m
..m
LOWER
THERMOSTP
',YELL
LOWER
J LEMEN
I
ELEC_RICAL
I GROUND GROUND EL
SCREW
WIRING NO, 6
I INTERLOCK)NG o
I (NON-SIMULTANEOUS) WIRING
FOR DOUBLE ELEMENT HEATER
L
FUSED DISCONNECT
OR CIRCUIT BREAKER
............. =
|l L1 L2 !
.......
I'
m
..m
HEATING
ELEMENT
ELEC_RICAL
GROUND GROUND
SCREW
2
WIRING NO. 7
L SINGLE ELEMENT HEATER
FUSED DISCONNECT
OR CIRCUIT BREAKER
HOT NEUTRAL
HEATING
ELEMENT
L
GROUND GROUND
SCREW
Z
IWIRING NO. t o
co
I SINGLE ELEMENT HEATER
FUSED DISCONNECT
OR CIRCUIT BREAKER
L2 L1 L2
:,- :!
:
m.
BLACK
=
UPPER THERMOSTAT
WITH HIGH LIMIT
CONTROL
LOWER THERMOSTAT
WITH HIGH LIMIT
CONTROL
BLACK
LOWER
EL
_&AL
_%D GROUNDo_
WIRING NO, 9
DOUBLE ELEMENT NON-
I _NTERLOCKING (SIMULTANEOUS)
_b
FUSED DISCONNECT o.,_
OR CIRCUIT BREAKER ,,'_-
u_z
....... -, ___
WlTHH_?THLLMIT
>-
BLUE
IYELL
UPPER
ELE_T_
LOWER TH ERMOSTA3"
WITH HIGH LIMIT
_CONTROL
BLACK
LOWEr
__AL _ I
GROUND GROUND o
SCREW _ I
I WIRING NO, t 3 _ I
DOUBLE ELEMENT INTERLOCKING
LLNON-SIMULTANEOUS) J
FUSED DISCONNECT
OR CIRCUIT BREAKER
m................ "3"1=
=
| \ \ c •
.......;.
YELLOW
i CONTROL
YE
LOWER THERMOSTAT
WITH HIGH LIMIT
CONTROL
BLACK LOWER
_EMENT
ELECTRICAL
GROUNDscREW G R OU ND _
3 PHASE BRANCH CIRCUIT
DOUBLE ELEMENT
I NON-SIMULTANEOUS)
FUSED DISCONNECT
OR CIRCUIT BREAKER
m
m
.J
UPPER THEF )STAT
WITH HIG LIMll
(CNI )L
L
YELLO V UPPER
LOWER THERMOSTAT
WITH HIGH LIMIT
CONTROL
_AL _ I
GROUND GROUND
SCREW _ I
3PHASE BRANCH CIRCUIT I
_DOUBLE ELEMENT SIMULTANEOUS I
BRANCH CIRCUIT SIZING GUIDE
Based on N.E.C. NFPA NO. 70 - 1999
Recommend Copper Wire Size
AWG Based on
WATT Over Current
LOAD Protection Rating N.E.C.
Table 310 - 16 (60°C)
120 208 240 120 208 240
V V V V V V
1500" 15 15 15 12 14 14
2000 20 15 15 10 14 14
2500 30 15 15 10 14 14
3000 30 20 15 8 12 12
3500 20 20 - 10 12
4000 25 20 - 10 10
4500 30 25 - 10 10
5000 30 30 - 10 10
5500 35 30 - 8 10
6000 35 30 - 8 8
9000 50 45 - 6 6
12000 70 60 - 3 4
* Wattages less than 1500 may be wired 14 gage with 15 amp
protection
16