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How electric water heater works Troubleshoot electric water heater Troubleshoot-gas-water-heater Troubleshoot Bosch tankless Do-it-yourself
2015

How to wire water heater with switches & timers

water heater single pole circuit
See larger

Control water heater with 15-20 amp switches


Do not connect 15 or 20 amp switches directly to 240V water heater


Resources
See inside box with contactor
Step-by-step installation of contactor
Figure volts-amps-watts for your water heater



Use two 3-way switches
See 3-way
switch circuit

Water heater timer circuit
See close-up of individual Timer wiring

Programmable ST01 and Ei600 single-pole or 3-way

Best choice for timer: No neutral wire needed
Timer is powered CR2 battery
For applications up to 100 feet away.
Buy:
Intermatic ST01c timer at Amazon/ 1 year warranty
Intermatic ST01 timer
Ei600 5-year warranty timer at Amazon
CR2 replacement battery at Amazon


Resources:
How to program and wire ST01 timer
Use ST01 as 24 volt photoeye
Load ratings for Intermatic timers/ pdf
Intermatic ST01C & Ei600

Step-by-step installation of contactor
Figure volts-amps-watts for your water heater


Do not connect ST01 directly to 240V water heater

Use timer and 3-way switch

Buy:
Intermatic ST01c timer at Amazon/ 1 year warranty
Intermatic ST01 timer
Ei600 5-year warranty timer at Amazon
CR2 replacement battery at Amazon


More uses for ST01 timer

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
ST01 timer controls HVAC
ST01 timer


Larger image

Leviton 6124 programmable timers are powered by the electric circuit so they work at any distance


Compare all Programmable timers

.pdf instruction manual
EZ instruction manual



Do not connect 15Amp 6124 timer directly to 240V water heater
Step-by-step how to wire contactor

countdown water heater timer circuit
Larger image

Countdown timers are powered by the circuit so they work any distance.

10-20 minutes to wash up
20-30 minutes to shower
40-60 minutes for bath
Compare countdown timers
Close-up Timer wiring



Do not connect 15A countdown timers directly to 240V water heater
Step-by-step how to wire contactor

Larger image

Programmable timers are powered by the circuit

Connect timer black to black hot wire arriving from fuseholder
Connect timer red wire to white wire that connects to contactor coil
Connect timer white wire and timer green wire to bare copper wire

programmable timer wiring
Larger image

Wiring illustration applies to any programmable or countdown timer with neutral wire

Same instructions shown above:

Black Hot from fuseholder connects to Timer Black
White wire connecting to one side of contactor connects to Timer Red wire (or blue wire)
Timer White and Timer Green connect to bare ground wire

water heater 30 amp switch
Larger image
Buy:
Leviton 3-way 30 amp switch
Leviton 3033 at Amazon
30 amp 3-way switches at Amazon
30 amp switches at Amazon
Double-pole 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 nut basics

Rated 25 amps, max 5500 watt water heater
5500 Watt elements draw 23 Amps
4500 Watt elements draw 19 Amps

Resource:
Figure volts amps watts for water heater
Read label on water heater

water heater switch
Larger image

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 switches at Amazon
Buy Wire: Orange/ 30 amp #10 gauge for water heater
25 foot 10-2 NMB indoor with ground
100 foot 10-2 NMB indoor with ground


Resource:
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
Buy double-pole double throw 30 amp
DPDT 30 amp at Amazon

Resources
Twisting wires
wire nut basics
Remote control water heater
Larger image

Remote control water heater

Control any amp water heater using RC615 120Volt receiver and RC639 transmitter.
Transmitter turns ON receiver. Receiver closes circuit on contactor. Contactor sends power to any watt water heater.
Illustrated is ordinary 3500 watt- 5500 watt residential non-simultaneous water heater, 30 amp breaker and 10 gauge wire. With 14 gauge wire running to transmitter.

See materials list

Up to 100 feet away
Manuals:
RC939 transmitter manual
Remote receiver manual
Buy:
RC939 3-channel radio transmitter at Amazon
RC613 series 120Volt receiver at Amazon
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

Additional links
 EJ500 Utilitec Tork ST01C  ST01C UPM Aube T1032Aube Intermatic EI500Intermatic
    Water heater GE  Leviton Hagar Gardena T1030  Gardena Brinks timer Brinks
Westek TE06WHB Woods

Power pack

Timex
 Countdown
Westinghouse timers
Westinghouse
Sylvania

Omron
 Dayton Westek timers
Westek

Power strips
3-phase timer
3-phase timer
Diehl timers
Diehl timers
Woods 49028
Outdoor timers

Troubleshoot Household electricity

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

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

How to wire 3-way switches
How to wire 4-way switches
How to wire TM811 and TM8111 switches
How to wire wall timers
How to wire box timers
How to wire Dayton off-delay timer
How to wire pin timers

How to wire and troubleshoot photo eyes
How to wire switches

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

Replace breaker
Install subpanel

Electrical formulas
Electricians forum
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
Romex 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
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
Gas and electric water heaters Support the economy:
Buy water heaters  from my associate links:

50 gallon Gas water heaters at Amazon
40 gallon gas water heaters at Amazon
50 gallon Electric water heaters at Amazon
40 gallon electric water heaters at Amazon
Hybrid / heat pump/ water heaters at Amazon

Resources:
How to install gas water heater
How to install electric water heater
Troubleshoot gas water heater
Troubleshoot electric water heater
Point of use water heaters
Gas and electric water heaters Industrial electric at Amazon

Industrial supplies at Amazon

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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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