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How to wire water heater with 2 timers
Back to install timer
Use only 600 volt wire.
Lamp cord, extension cords are not rated 600 volt.
Use copper wire only. Aluminum wire is fire risk and should be avoided or installed by professional.

30 amp breaker use 10 gauge /


Buy:
10-2 gauge/ 30 amp
10-3/ 30 amp
Southwire electric tools
Yellow 12 gauge 20 amp


Yellow/ #12 gauge wire for 20 amp
with ground
Buy:
12-2 gauge/ 20 amp
12-3/ 20 amp

NMB is house wiring
UF is underground
Rolls of stranded wire
White 14 gauge 15 amp


White/ #14 gauge wire for 15 amp
with ground
Buy:
14-2 gauge/ 15 amp
14-3/ 15 amp

NMB is house wiring
UF is underground
armored cable
Buy:
Armored cable
Southwire armored cable cutter
Southwire armored cable cutter
Buy:
Rolls of stranded wire

Stranded wire
stranded wire
Buy:
Rolls of stranded wire
50-60 amp breaker use 6 gauge /
6-2 wire
Buy:
6-2 wire
Southwire electric tools
NMB is house wiring
UF is underground
40-50 amp breaker use 8 gauge /
6-2 wire
Buy:
8-2 wire
Southwire electric tools
NMB is house wiring
UF is underground
    
Copper ground wire
Use same size as other wire in circuit

Buy:
12 gauge copper ground wire
Ground wire
Green ground wire
Ground pigtails
Ground rods/ ground clamps at Amazon

Buy
End cutting nippers at Amazon


When removing insulation from wire, do NOT score or put cuts on surface of copper wire. Doing so increases resistances on wire and creates weak point.
Buy tools:
Wire strippers at Amazon
Linesman pliers
Utility knife at Amazon
multimeter
Buy:
Multimeter
Electrical testers
water heater 3-way switch
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Control water heater with ordinary 15-amp 3-way switches

Buy:
3-way switches at Amazon

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

Caution


Do not connect 15-20 amp switches directly to 240V water heater
Water heater 3-way timer
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Works for applications up to 100 feet away
Timers are rated 15-amp
Buy:
Intermatic ST01c timer at Amazon/ 1 year warranty
Intermatic ST01 timer
Ei600 5-year warranty timer at Amazon
CR2 replacement battery at Amazon
3-way switches at Amazon

Resources:
How to program and wire ST01 timer
Intermatic ST01C & Ei600
Timer wiring
Load ratings for Intermatic timers/ pdf
Load rating for ST01 timer: 120V ac, 6A, 208-277V ac; DC Loads 4A 12V dc, 2A 28V dc; Motors 1HP 120VAC, 2HP
240V ac, Ballast 16A 120V ac, 208-277V ac; Resistive 20A 120-277Vac.


Do not connect these switches and timers directly to 240V water heater
Step-by-step installation of contactor
Figure volts-amps-watts for your water heater
Water heater timer circuit
ST01 timer More uses for ST01 timer

ST01 timer controls water heater or any 240 volt load
Resource: Control motor with ST01 timer

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

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Override programmable timer with countdown timer
Grab Neutral wire from any nearby light fixture or outlet.

Buy:
Intermatic FD timer at Amazon
59017 programmable timer

Resources:
Programmable timers
Countdown timers
Override programmable timer with countdown timer, programmable timer, wifi, z-wave, Insteon home automation
Neutral and Hot arrive from any nearby outlet box

Buy/ requires neutral
Honeywell RPLS730B white/
RPLS731 almond
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 has 2 hot wires <> putting a switch on 1 hot wire will work

Buy:
Leviton 3033-2 3-way switch at Amazon<
Leviton 3-way 30 amp switch
Leviton 3033 at Amazon
30 amp 3-way switches at Amazon
>30 amp switches at Amazon
Safety 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
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
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240V water heater can be controlled directly with a 30-amp switch

Look for green colored switch
30 amp x 80% = 24 amp safe maximum
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
5500 Watt elements draw 23 Amps
4500 Watt elements draw 19 Amps
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/ indoor / 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
240 volt water heater circuit
Compare ways to control water heater
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
Resources:
Troubleshoot Gas valves with manuals
Icon gas valve

How to replace water heater element Waste King disposal
How to wire tankless electric


Install point of use water heater
Titan tankless

Contactors/ relays
Type 1 and type 2 surge protection surge protection
Programmable timers

Woods timers
surge protection
Anode rods anode rods
Recirculation system

Tankless recirculation
Point of use water heater
Install and troubleshoot garbage disposal Waste King disposal
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Electronic parts

Industrial supplies

Tools and home improvement

Home and garden

Hayward pool
Pentair pool

Southwire electric
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Tools

DEWALT
Black and Decker
Stanley
SKIL
Makita
Porter-Cable
Bosch

Irwin Hand tools
Klein hand tools
Fluke electrical testing
Dremel hobby tools

Campbell Hausfeld air powered
Tekton automotive

Powerbuilt automotive
Saws and saw blades
box timers Resource:
Compare box timers
DPDT timers
Intermatic
Control water heater w/ Z-wave
Intermatic control centers Resource:
Intermatic control centers: and parts
Digital control centers and parts
Tork control centers and parts
Subpanels
All control centers and parts
Enclosures
programmable timer Resource:
Programmable timers
Countdown timers
Off delay timers
On delay timers
Timer modules
Din rail
Twin & one-shot
Woods
Intermatic
Tork
Low voltage power packs Recirculation systems
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