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ST01C timer controls 240Volt water heater
30 amp breaker use 10 gauge /

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
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
14-2 gauge/ 15 amp
14-3/ 15 amp

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

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

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

End cutting nippers at Amazon

Buy tools:
Wire strippers at Amazon
Linesman pliers
Utility knife at Amazon
Electrical testers
ST01C timer controls 240Volt water heater
Timer has 3 wires plus green ground wire
ST01C timer controls 240Volt water heater
No Neutral wire needed
Ground wire not shown

Intermatic ST01c timer/ 1 year warranty
ST01a almond
Intermatic ST01K combination timer
DPST contactor with 240V coil
Fuseholders at Amazon

See the whole project and materials list
Fuseholder installation
Contactors/ what they do
Terminals/ how to install

ST01 timer/ How to program ST01C
More wiring for ST01C
Same wiring applies to Intermatic Ei600
All Intermatic timers and manuals
st01 timer
Buy: ST01 /
120-240 volt/ any load/ no neutral
Intermatic ST01c timer
Intermatic ST01 timer
ST01C timer controls 240Volt water heater
Larger image
ST01C timer controls 240Volt water heater

Timer does not require neutral
Battery operated
Can control any voltage
Must be fuse-protected
240Volt coil DPDT contactor
See materials list and installation
Contactor with 240Volt coil At Amazon
mens zippered jacket

Busman fuseholder
Use solder or terminals
Recommend terminals be soldered
   Buy: fuseholder:
Buy fuseholder at Amazon
Buy fuseholders at Amazon
Some fuseholders accept terminal connections, some have solder-only connections. Fuse block has screw terminals.
Reverse dawn-dusk operation to dusk-dawn
GE 15312 timer has astronomic function to turn Lights ON at dusk and OFF at Dawn.
To reverse operation, connect timer red and blue wires.
If you want dawn-to-dusk operation instead of dusk-to-dawn, then connect red wire to blue wire.

This action will reverse timer operation.

Contactor recommended for all motor loads
Override ST01 timer program using air switch, single-pole switch or another timer.

This action reverses ST01 program, so OFF becomes ON, and ON becomes OFF

3-phase astronomic timer 3-phase dawn-dusk timer

Control 3-phase using ST01 timer

HVAC contactors
Inline fuse holders
Din rail fuse holder
contactorBasic contactor wiring:
Trun off breaker so electricity is OFF. Use terminals to connect the smaller wires to line side
Use 10-15 amp inline fuse on one of the two wires to protect timer and relay circuit from 50-60 amp air conditioner circuit. The fuse will protect entire length of circuit.
Prevent loose connection and risk of fire: Do not put two different gauge wires under the screw plate on contactor. Never put stranded wire under screw plate.

HVAC contactors
Inline fuse holders
Din rail fuse holder

Relays and contactors
ST01C timer controls 120Volt delay-off-timer

Activate off-delay timer using push button -or- using ST10 timer
Push button, or ST01, activates delay timer.
Push button gives momentary on-off to activate delay timer
When ST01 turns ON and then OFF, then delay timer activates
Delay timer turns Load ON
Delay timer begins countdown.
When countdown expires, delay timer turns Load Off
6A855 Solid State timer at Amazon
11-pin plug-in base at Amazon
Contactor with 120volt coil
ST01 battery-operated timer
6A855 Manual
More off-delay timers
ST01 delay timerON Delay/ Off delay
Illustration shows ON delay wiring.
On delay means the load turns ON after delay period expires. Load remains ON until power is off.
Example uses ST01 timer as switch. (Or use Ei600... sme timer with 5-year warranty)

ST01 Timer can be set for dusk-dawn. Automatically turns lights ON at night, and off at dusk.
ST01 Timer automatically adjusts for seasonal changes.
ST01 Timer can be adjusted 20 minutes longer or shorter than actual dusk-dawn

However some folks want longer delay before lights turn ON at night
How it works:
ST01 Timer tunrs ON. AH3 timer receives power. Time delay countdown begins.
After delay period expires, light turns ON, and remains ON until ST01 timer turns OFF
Cycle repeats next tim the ST01 timer turns ON.
Intermatic ST01 timer
Ei600 timer at Amazon
CR2 replacement battery at Amazon
Intermatic ST01 timer and manual
How to wire and program ST01 timer
How to wire off-delay timers
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Icon gas valve

How to replace water heater element Waste King disposal
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box timers Resource:
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programmable timer Resource:
Programmable timers
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