Heating Element Properties

TECHNICAL SERVICE DEPARTMENT
Technical Service Bulletin
1-800-432-8373
Heating Element Properties - Voltage, Amps and Ohms; Recovery; Circuit Breaker
Please check all local electrical codes before installing or changing wiring on electric water heaters.
Technical Competence, Product Confidence
Page 3 of 3
1305.DOC
Special 120-Volt Applications
* Less; than 1500 watts may be wired 14 gauge with 15 amp protection. Check local electrical codes.
The 4500 Watt Standard
Wattage
Rating of
Heating
Element
120 Volts 208 Volts 240 Volts 277 Volts 480 Volts
Amps Ohms Amps Ohms Amps Ohms Amps Ohms Amps Ohms
4500 -- -- 21.6 9.6 18.8 12.8 16.2 17.1 9.4 51.2
Temperature Rise - Degrees Fahrenheit
40
0
50
0
60
0
70
0
80
0
90
0
100
0
110
0
120
0
130
0
140
0
4500 47 37 31 27 23 21 19 17 16 14 13
Recommended Over
Current Protection
(Fuse or Circuit Breaker)
Amperage Rating
Copper Wire Size –
AWG Based on N.E.C.
Table 310-16 (75
0
C.)
Heating
Element
Wattage
Recovery
in Gallons
per Hour
120V 120V
1500* 7.75 20 12
1700 8.8 20 12
2000 10.3 25 10
2500 12,.9 30 10
3000 15.5 35 8
Recommended Over
Current Protection
(Fuse or Circuit Breaker)
Amperage Rating
Copper Wire Size –
AWG Based on N.E.C.
Table 310-16 (75
0
C.)
Total
Water
Heater
Wattage
P
h
a
s
e
208V 240V 277V 480V 208V 240V 277V 480V
4500 1 30 25 25 15 10 10 10 14
3 30 25 --- 15 10 10 --- 14