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How to wire water heater with 2 switches

water heater 3-way switch
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Control water heater with 3-way switches


Buy 3-way switches:
3-way switches at Amazon

Resource:
See step-by-step installation of contactor
Figure volts-amps-watts for your water heater
How to wire switches



Do not connect 15-20 amp switches directly to 240V water heater. Amp rating shows on each switch

control water heater with 3-way switches
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Control water heater with two 15-20 amp 3-way switches (same as above)

Buy 3-way switches:
3-way switches at Amazon

Contactor with 120Volt coil At Amazon
Contactor with 240Volt coil At Amazon

Resource:

See step-by-step installation of contactor
Contactors


Water heater 3-way timer
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3-way switch and 3-way timer

Intermatic Ei600 and St01C are 3-way timers
For applications up to 100 feet away

Timer and switch control contactor
Contactor turns heavy-amp load on-off

Buy:
3-way switches at Amazon
Intermatic ST01 timer at Amazon

Resource:
Intermatic timers: ST01C & Ei600
Intermatic timers and manuals
More wiring for ST01C + ST01C programming

How to find Hot wire
See step-by-step installation of contactor
Figure volts-amps-watts for your water heater


Do not connect these switches & timers directly to 240V water heater
ST01 timer
Red-Blue-Black-green wires
LED display is not illuminated

Other uses for ST01 timer:

Resource:
Programmable or dawn-dusk or dusk-dawn, any voltage or no voltage
ST01 timer controls water heater or any 240 volt load
Reverse ST01 using Intermatic air switch   / Resource: Intermatic air switches
Use ST01C for 4-way timer
ST01 24 volt DC photoeye
Convert single-pole switch into 3-way switch using ST01/ Resource: How to add a switch   How to add 3-way switch
24 volt programmable timer

water heater 30 amp switch
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240V water heater can be controlled directly using 30-amp switches

Illustration for 30-amp 3-way circuit
Note: 240V circuit can be controlled by turning off 1 hot wire

Buy:
Leviton 3-way 30 amp switch
Leviton 3033 at Amazon
30 amp 3-way switches at Amazon
30 amp switches at Amazon

Resources
Twisting wires
wire connector basics

Rated 25 amps, max 5500 watt water heater
5500 Watt elements draw 23 Amps
4500 Watt elements draw 19 Amps
Figure volts amps watts for water heater
Read label on water heater



water heater switch
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240V water heater can be controlled directly with a 30-amp single-pole switch

Look for green colored 30 amp switch
Turning off one hot wire to 208-240V single phase water heater will work. Internal thermostat wiring inside water heater also turns off one hot wire.

Buy:
Cooper 3032 switch at Amazon
Leviton 3032 30 amp switch at Amazon
Leviton 30 amp switch at Amazon
30 amp switch/ maximum 25 amps
5500 Watt elements draw 23 Amps
4500 Watt elements draw 19 Amps
Resources
Figure volts amps watts for water heater
Read label on water heater

How to wire thermostats
control water heater with switch

240V water heater can be controlled directly with a 30-amp double-pole switch

Rated 25 amp
Turn off both Hot wires.
Not necessary, since turning off 1 hot wire works fine. Read above

Buy double pole 30 amp switches:
Leviton 3032-2w double pole 30 amp at Amazon
Leviton MS302-DS 30 amp double-pole switch at Amazon
2-pole 30 amp non-fusable safety switch/ power cut-off
30 amp switches at Amazon


Resources
Twisting wires
wire connector basics
30 amp DPDT switch

For certainty, always Test switch terminals using continuity tester before wiring.
24 amp safe maximum
Practical wiring diagram
Wire diagram
Toggle water heater between 120Volt and 240Volt
Max 4500 watt non-simultaneous water heater
Use 240Volt during times when electric prices are lower, and faster recovery is needed. Use 120Volt during peak prices when less hot water is used
Bring 120Volt from nearby outlet that has 12 gauge wire, or install lower watt elements if wire is only 14 gauge.

Using 30 amp Double Pole Double Throw switch
Ordinary 3-way switch will do same job, but without center off
Also called: 30 amp 2 pole DPDT switch
Buy double-pole double throw 30 amp
2 DPDT switch with center off at Amazon
2 DPDT switch with center off at Amazon

Connect 120Volt wires as Hot and Neutral. Black connects to 120Volt circuit breaker and White connects to neutral busbar.
Connect 240Volt wires as Hot1 and Hot2. Both wires connect to 240Volt breaker.
Resources
How to wire water heater for 120 volts
Select correct wire and breaker
Figure volts amps watts for water heater
See inside main breaker box
Two water heaters
How to control motor with two switches
30 amp maximum current/ safe limit 80% = 24 amps
Over-amped switch will feel warm/ hot
How to control water heater with ordinary switches
Leviton 3033 switch
Larger image

Use 30 amp 3-way switch to toggle water heater between 120V and 240V

Does same thing as diagram above... except diagram above has center off position Buy:
Leviton 3033 switch at Amazon

30 amp switch/ maximum 25 amps
5500 Watt elements draw 23 Amps
4500 Watt elements draw 19 Amps
Resources
Figure volts amps watts for water heater
Read label on water heater
240 volt water heater circuit

Basic water heater circuit

Single-phase 208-240Volt/ residential/  non simultaneous water heater

Resources
How residential water heater works
How to wire thermostats
Troubleshoot electric water heater
See inside main breaker box

3-phase water heaters
Convert 3-phase water heater to single-phase


30 amp safety cut off

30-Amp 120-240-volt Two-Pole Indoor Safety Switch with Neutral/ fusable

Buy:
2-pole 30 amp non-fusable safety switch/ power cut-off

2 pole 60 amp non-fusable / outdoor box/ at Amazon
Safety switches at Amazon
Safety switches for power tools

Resource:
How to wire safety switch
You can use fusable or non-fusable
Having more than one fuse on same line is ok by code

Basic household wiring
Basic water heater circuit

Figure volts amps watts for electric water heater
Test elements
Replace elements
How to wire tankless electric
How to change water heater temperature using timer
Change water heater from 240Volt to 120Volt
Replace thermostats
How to wire thermostats
How to wire water heater for off peak operation

How to twist wire
How to wire Cooper 277 pilot light switch
How to wire combo switch-outlet
How to replace 3-speed fan switch
 

How to wire dimmer
How to wire 3-way dimmer
How to wire occupancy switch
How to wire motion detector
How to wire TM811 and TM8111 switches
How to wire wall timers
How to wire box timers
How to wire off-delay timer
Wire off-delay timer
How to wire pin timers

How to wire and troubleshoot photo eyes
Reverse photoeye so it turns on in day
24 Volt photoeye
24 volt programmable timer

How to wire switches
How to add switch
How to add 3-way switch


Timer for 3-way switch
Timer for 4-way switch

How to add outlet 
How to wire 3-way switches
How to wire 4-way switches


Troubleshoot Malibu outdoor lights
Terminals 
Select and install wire connectors
Select wire size

Electrical formulas
Electricians forum
 

Electrical pages


How to wire arc fault breaker
How to wire GFCI
How to wire GFCI combo

Basic water heater circuit
How to wire water heater for 120Volt
Install old work box

How to drop wire from attic
Wire connector

How to wire 240volt outlets
How to install 3-phase timer
How to wire 3-phase outlets
How to wire 3-phase surge protector
What is 3-phase

How to wire whole house surge protector
How to wire under-counter water heater
 

See inside main breaker box
Replace breaker
Install subpanel

Fuseholder
Contactors
How to solder wires
Whole house surge protector
3-phase surge protection
Circuit breakers

Difference between 120 volt and 240 Volt
Difference between 50Hz and 60Hz
How to install electric meter on water heater
How to wire water heater thermostat
How to wire water heater with switches and timers

6x6x4 Enclosures
Intermatic timer enclosures

Convert AC water heater to DC
How to wire DC solar water heater
DC relays for solar water heater
How to add another thermostat to water heater

How many Kwh to heat water
Chart for figuring heating time for electric heater

Gas and electric water heaters Industrial electric at Amazon

Industrial supplies at Amazon

Industrial and scientific Amazon
Tools
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box timers Compare box timers

Control water heater w/ Z-wave
Intermatic control centers Control centers:
+ manuals and parts


All control centers and parts

Including Z-wave
programmable timer Compare programmable timers

Control water heater with programmable wall timer
Countdown timers Compare countdown timers

Control water heater with countdown timer
Low voltage power packs Low voltage transformers

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