Stick men
Always bring helpers
is a self-help site
Cost to operate water heater Figure Volts Amps Watts for water heater How to wire tankless electric
How to install point of use water heater Point of use water heater
Compare 16 electric and 3 gas water heater timers Troubleshoot Rheem tankless Clean sediment out of water heater
9 ways to save with water heater
How to install recirculation system Point of use water heater
How electric water heater works Troubleshoot electric water heater Troubleshoot-gas-water-heater Troubleshoot Bosch tankless
Type 1 and type 2 surge protection surge protection
Search / all results
Search using Find button  

 Tweet button  

How to install timer

Single pole timer

(With or without neutral wire available inside box)
Applies to most ordinary in-wall timers
How to replace ordinary wall switch with single pole timer

Your wall switch has 2 wires, plus green ground screw for bare-copper ground wire.
Timer has 3 wires, plus green ground wire.

Extra wire on timer is used to run clock inside timer.
Typical in-wall timer clock consumes .8 Kwh per year

Manual says:
Timer-Black-wire to Hot;
Timer-Red-wire to Load (lights)
Timer-White-wire to Neutral.
Timer-Green to ground.
Heres what to do
1) Timer-green-wire connects to bare ground wire.
2) Switch has 2 wires.
Take switch wires and connect them to timer-black-wire and timer-red-wire.
Choose either one for now.
Variations: (Leviton timers have blue wire instad of red) (and Some 3-way timers have both red and blue... use blue and cap red)
3) In back of electric box are white wires twisted together and covered with wire connector. Connect timer-white to these wires.
4) If electric box does not have white wires described above, then connect timer-white to bare ground. Timer will work until you have time to run additional White neutral wire from nearby outlet.
5) Turn on electricity, and push ON-OFF button. If lights come on, timer is wired correctly. If lights do not come on, then reverse timer-red and timer-black wires.
If lights blink after installing timer, then white wire is connected to red wire.
Single pole wiring above applies to
: Ei500, ET724, Ei200 series, ET616, E1010, E1020
: 15071, 15086, 15265, 15266, 15318, 15067, 15088, 15070
: 701, 711, SS720, D1060, D212
LST 100, 200, 300
6200 series, LBT60 series
: 31500 series
: 59018, 59028, 59000 series, 59017
: LW60419, 0192773, LW60418, 0141224, 156020
: SA150 , SA 155, SA160, SA170
DT1800, HET01, PT800
Pass and Seymour
MA-T series
RT50 etc
Westek in-wall timers
Single pole wiring above applies to
(Random photos)

 Swilight LST 700  
Intermatic EI500    
Tork 701A   Pass and seymour RT12
Hagar horizontal wall timer
Grasslin ET616 
GE 15313 incandescent-only 7-day timer
See GE 15313
Leviton LTT series coundown / incandescent only
See Leviton LTT

Digital Timers with NO white neutral wire

Follow same directions shown above, except ignore white wire connection.

Larger image

3-way Timers

Open following links
GE 15312 wiring
Applies to GE 15312 timer
Intermatic ST01C wiring
Intermatic Ej500 wiring
Applies to ST10C, Ei600, Ej500, Ej600, Ei400
Remember, the timer replaces 1 of the three-way switches. The other three-way switch is rewired to operate as ordinary on-off switch. The remaining switch functions to reverse the timer programming.
Larger image of wiring
Another image of wiring
Instruction manual and wiring

Single-pole spring wound timers

 12 hour shut off timer  Spring wound timers have connections for 2 wires, and some models have 4 wires
See all spring-wound timers
Spa timer wiring
Timer, spa and wires are GFCI-protected when Black Hot and White Neutral wires are connected to Line and Load screws as illustrated.
Most spa timers have maximum 20 amp rating, and will turn contactor on-off instead of directly controlling motor load, depending on motor rating, and spa design.
See contactor wiring
How to wire GFCI

Spa timers and modules

PB series digital

PB series mechanical

 Diehl mechanical

FM1 series

Intermatic FM1 timer
TB 178 timer
Box type timers, and other timers

See all boxtype
How to wire Intermatic T100 series and T170 series timers
How to wire Intermatic Sprinkler timers
How to wire WH40, EH40, EH10, WH21 timers
How to wire Intermatic ET series timers
How to wire Intermatic GM40 and WHQ timers
How to wire T1906, T1905, T1975, T1976 timers
How to wire Intermatic ST01C, Ei600, EJ500 timers
How to wire Intermatic/Malibu timers
How to wire Intermatic FM1 timer
How to wire Intermatic PB300 series timer
How to wire Intermatic whole house surge
How to wire remote control timer
How to wire 3 phase timer
How to wire GE 15312 timer
How to wire GE 15207 timer
How to wire GE Box timers
Tork DTU40 wiring

How to wire box timers

Intermatic GM seriesTork-DTU40
Greenbrook T80 timer wiring

How to wire DIN rail timers

In-wall water heater timers

How to wire timers for water heater timer
277 480 3-phase WYE

3-Phase timer

How to wire 3-phase timer
How to install 3-phase surge protector
Wire GE 15312 timer

How to wire switches

How to wire switches

240Volt outlets and plugs

How to wire 240Volt outlets and plugs


GFCI breakers at Amazon
Arc fault breakers at Amazon

How to wire GFCI outlets and combo-switches
Select correct wire size
Select and install wire connector

Household NM-B Wires are color-coded so inspectors/ electricians can easily identify which wire is used during construction

Electricity leaves power plant What is 3-phase electric: power plant to end user
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

How to install gas water heater
Troubleshoot gas water heater
Troubleshoot electric water heater
box timers Compare box timers
programmable timer Compare programmable timers
Countdown timers Compare countdown timers
Compare power packs

Enter Amazon from my links

My response might end up in spam folder, check email folders
Privacy policy
Author page/ My Books
Back to top