A.O. Smith RPV series Installation Instructions And Use & Care Manual page 9

Model Recommended
Breaker Size
(Amps)
*P**-40-Y5 20
*P**-60-Y5 25
*P**-73-Y5 30
*P**-90-Y5 40
*
All wiring/conductors must be rated for 90°C or greater.
† Maximum recommended wire size is #6 cu AWG.
‡ This model may used with a 208 VAC supply. Use of 208 VAC may require different breaker and/or wire sizes.
Follow all code requirements.
Model Recommended
Breaker Size
(Amps)
*2**-140-X5 40 amps each
(2 circuits)
*2**-120-E5 60 amps
*2**-140-E5 60 amps
*2**-160-E5 40 amps each
(2 circuits)
*2**-180-E5 40 amps each
(2 circuits)
Point-of-Use Models
(For potable water heating only. Not for space heating.)
NOTICE: Models sorted by Voltage, then by Wattage per Element.
Voltage Number
of
Elements
277 1
277 1
277 1
277 1
Two-Chamber Models
(For potable water heating only. Not for space heating.)
NOTICE: Models sorted by Voltage, then by Wattage per Element.
Voltage Number of
Elements
208 2
240 2
240 2
240 2
240 2
*
All wiring/conductors must be rated for 90°C or greater.
† Maximum recommended wire size is #6 cu AWG.
Wattage Current per
per Element Breaker
(KW) (Amps)
4 14.44
6 21.66
7.3 26.35
9 32.49
Wattage per Current per
Element (KW) Breaker
(Amps)
7 33.65
6.1 50
7 58.34
8 33.33
9 37.5
Electric Tankless Water Heater
Recommended Element Type
*
Wire Size
(AWG)
12 Single
10 Single
10 Single
8 Single
Recommended Element
Type
*
Wire Size
(AWG)
8 Single
6 † Single
6 † Single
8 Single
8 Single
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