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3 phase astronomic timer: 
3 phase astronomic timer3 phase 4-wire

Use with 120-208, High leg Delta, 240, 277-480.
ST01 battery-operated timer is dusk-dawn programmable timer rated for 12-24 V AC/DC and 120-208-240-277V AC.
Not rated for 480, 600 volt.
Rated for inductive loads (contactor)

Timer powered by CR2 battery/ requires no voltage to operate switching.
Cold weather: Battery cannot be exposed to freezing temps beyond 22 days.

Cap red wire for dusk-dawn operation.
OR connect red and blue timer wires together for reverse dawn-dusk operation.

Fuse protects 15 amp timer.
Connect power to timer black wire.
 Connect load to timer blue wire.

Timer turns ON contactor...
Contactor controls 3-phase load.
For this illustation, select contactor with coil voltage that matches phase voltage. (measured between Hot wire and Neutral).
3-phase wire colors vary.

Buy:
Intermatic ST01 timer
Ei600 5-year warranty timer
CR2 replacement battery at Amazon
3 phase 3-wire
Alternate design without Neutral wire.
Use with 120-208, high leg delta, 240 ... but not 277-480 since 2 hot legs would pull 480 volt.
Timer not rated for 480, 600 volt.
For this illustation, select contactor with coil voltage that matches line voltage (measured across 2 Hot wires).
Buy:
Intermatic ST01 timer
Ei600 5-year warranty timer
CR2 replacement battery at Amazon
3 phase photo eye Three-phase 4-wire 120-208-240-277 volt
Use dusk dawn photo eye.
Neutral wire required
Note Neutral wire connected to one side of contactor and to photoeye.
Fuse required to protect photo eye from over voltage
Three wires run to photo eye.
Photo eye black connects to Hot
Photo eye red connects to Load (contactor)
Photo eye white connects to Neutral.
For this illustation, select contactor with coil voltage that matches phase voltage. (measured between Hot wire and Neutral).

Buy:
120-277 volt photo eye
3-pole 277 volt contactor
3-pole 120 volt coil
347 volt photo eye
3-pole 347 volt contactor
208 volt photo eye
3-pole 347 volt contactor
480 volt photo eye
3-pole 480 volt contactor
3-pole conrtactors

Panel mount fuse holders at Amazon
Din Rail fuse holder
ST01C
Larger image
LCD display is not lighted

Intermatic ST01C buttons
All Intermatic timers
Dusk-dawn astronomic timer

ST01C  7-day/ battery operated no neutral required / single-pole or 3-way
Ei600  / same as ST01 except 5 yr warranty instead of 1 yr warranty
/astronomic or programmable/  single-pole 3-way/ 1 yr warranty/ No neutral/ uses CR2 battery
Programmable or Astronomic dawn-dusk/ 6 ON and 6 OFF settings per 7-day week
Incandescent, CFL, LED, motors, ballast, DC loads/ AC and DC loads 24V up to 277Volt.
Permanent override/ No loss of memory in power outage or battery change

ST01C is white/ ST01AC is almond
Use deco wall plate
Buy:
Intermatic ST01 timer at Amazon
Ei600 5-year warranty timer at Amazon
CR2 replacement battery at Amazon


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

Sell sheet with model numbers
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.
3-pole contactor
Heavy amp loads: 20-90 amps
L terminals for Line wires from breaker
T terminals for load wires

3-pole contactor
3-pole definite purpose Contactor sizes approximately:
20-40 amp 3" tall x 2.4" wide
50-60 amp 3.75" tall x 2.7 wide
75-90 amp 4.5' tall x 3.5 wide

3-pole contactor
Light amp loads: 8-12 amps
A1 A2 coil voltage
L terminals for Line wires from breaker
T terminals for load wires
Terminals 13-14 NO / terminals 21-22 NC
Other terminals apply to auxiliary blocks

Resources:
How to wire motor control contactor
Difference between contactor and relay
How to wire 3-phase
DC relays for solar power

DC contactor
DC circuit breaker
Buy 3-pole contactors/ AC ratings
Buy manufacturer:
Packard 3-pole contactor
Brah contactors
Market Forge contactor
Schneider contactor at Amazon
Kripal 3-pole contactor/ they email asking which coil voltage
Furnas contactor at Amazon
Siemens 3-pole contactor
Siemens 3RT motor contactor
Eaton 3 pole contactor with contact block connection
Allen-Bradley 3 pole contactor
Migro contactor
Fasco 3-pole contactor
Mars 2-pole and 3-pole contactors at Amazon


By coil voltage and amp rating

3 pole 24Volt coil
40 amp 3-pole 24V coil Packard
50 amp 3-pole 24V coil Mars
60 amp 3-pole 24V coil Packard
75 amp 3-pole 24V coil Mars
75 amp 3-pole 24V coil Norak

90 amp 3-pole 24Volt lug connection Norak

3--pole 24 Volt DC coil
Siemens 3RT10 up to 460 volt 5 Hp with auxiliary contacts


3-pole 120Volt coil
25 amp 3-pole 120V coil Brah
30 amp 120 volt coil Packard
30 amp 3-pole 120V coil Brah
30 amp 120 volt Mars
30 amp 120 coil Eaton
40 amp 120V coil at Amazon / Packard
50 amp 120V coil Norak
50 amp 120v coil Mars
50 amp 3-pole Migro
60 amp 3-pole 120Volt coil Packard
60 amp 3-pole 120V coil Mars
75 amp 3-pole 120V coil Norak
75 amp 3-pole 120V coil Mars
90 amp 3-pole 120 volt coil Square D
100 amp 3-pole Kripal

3 pole 208-240Volt coil
30 amp 3-pole 240V coil
30 amp 208-240 coil Mars

40 amp 208-240 volt Eaton
40 amp 208-240 Mars

50 amp 208-240 V Mars
60 amp 240 volt Mars
60 amp 3-pole 240V coil Mars
75 amp 3-pole 240V coil Norak
90 amp 3-pole 240Volt coil Norak
90 amp 3-pole 208-240Volt coil Mars


3 pole 277volt coil
20 amp 3-pole 277V coil Norak
30 amp 277V coil 3-pole Norak
30 amp 277V coil Mars
40 amp 3-pole 277V coil Norak
50 amp 3-pole 277V coil Norak
50 amp 3-pole 277V coil Mars
60 amp 3-pole 277v coil Norak
60 amp 277V coil Mars
75 amp 277V coil 3-pole Norak
75 amp 277V coil Mars
90 amp 277V coil 3-pole lug terminals Norak
90 amp 277 V coil Mars

3 pole 480Volt coil
30 amp 480V coil Mars

40 amp 480V coil at Amazon/ Brah
40 amp 480V coil Noark
40 amp 480V coil Mars
50 amp 480V coil Noark
50 amp 480V coil Mars
60 amp 480V coil Noark
60 amp 480V coil Mars
75 amp 480V coil Noark at Amazon
75 amp 480V coil Mars
90 amp 480V coil Noark at Amazon
90 amp 480V coil Mars

Resource:
Mars-Furnas contactor .pdf
      contact block Contact blocks/ pneumatic timer attachments.
Activated by mechanical action of contactor, instead of electric current.
On delay timers delay start time./
Once the timer block activates, the countdown begins.
When countdown ends, the timer's internal relay activates.
Adding timer block, allows the contactor to control additional circuit with time delay.

Buy: Contact blocks at Amazon
Delay contact block at Amazon
45EG20AF contactor Pull boxes/ metal
DTSP contactor bolted into a 6x6x4 enclosure using #8-32 bolts
Buy:
6x6x4 Metal box: has knock-outs for 1/2 and 3/4" ... must drill 1/2" hole for fuseholder, bolt holes to hold contactor, threaded holes for 10-32 ground screw, metal box must be grounded.
Indoor 6x6x4 metal pull box with cover and knock-outs/ Raco
Indoor 6x6x4 pull box with knockouts on 4 sides/ Wiegman
Indoor 6x6x4 pull box with knockouts on 4 sides/ Hoffman
Outdoor 6x6x4 box with bottom knockouts

Indoor 6x6x4 metal pull box with cover and knock-outs/ Raco
Indoor/ hinged door 10x10 x 6 / Bud Industries

Indoor / hinged door/ 6x8x4 box / Bud Industries


Bud industries boxes at Amazon
Arlington boxes at Amazon
6x6x4 enclosure Junction boxes/ Plastic and metal

Buy:
6x6x4 plastic box: no pre-drilled holes... must drill holes for Wire connections, 1/2" hole for fuseholder, 3/16" holes for bolts to hold contactor, plastic box does not need ground screw connected to box
Cantex 6x6x4 PVC plastic enclosure with cover at Amazon
Thomas and Betts 6x6x4 plastic with cover at Amazon
Bud industries 11x7x5 box without knockouts
Busman HKP-HH fuse holder


Busman fuse holder/ panel mount/ drill 1/2" hole
Some fuseholders accept terminal connections, some have solder-only 15 Amp ceramic fuseconnections. 
Fuse blocks have screw terminals.

Buy:

Panel mount fuse holders at Amazon
Buy fuseholder at Amazon

Buy: fast and slow acting fuses:
Ceramic fuses at Amazon
Fast acting ceramic fuses
Din Rail fuse holder/ din rail mount/
Din rail is surface mount

Buy:
Din Rail fuse holder

Multimeter

Test for breaks in wire/ Test for voltage
Most appliance require 80% rated voltage to function correctly
Buy
Multimeters at Amazon
Electric testers at Amazon
Resource:
How to test and replace element
How to test thermocouple
Element tests for 120 volts
How to test wire
Safety when testing wires:
Never touch wet or previously flooded appliance.
Never stand on wet surface when working on electric.
Never stand on bare soil, put down dry boards.
Tape tester leads to wood sticks to keep hands away from power.
Use non-contact voltage tester before touching wires.
Never touch or lean into any made of metal.
Remove metal objects from pockets.
Do not use oxygen or fuel accelerants in same room as electrical repairs

Resource:
Basic house wiring

Non-contact voltage tester

Test for power without touching connectors
NEVER assume power is OFF
Buy:
Non-contact voltage tester Amazon
Electric testers at Amazon
Resource:
How to test electric power is off
wire connector assortment

Twist-on wire connector assortments

Do not reuse old connectors
Buy:
Connector assortment at Amazon
Connector assortment at Amazon
Resource
How to select and install twist-on wire connectors
Weatherproof wire connector

Weatherproof wire connector

Connector cavity is full of silicone
Built-in cover keeps silicone in place
Protect from water, dust etc
Buy from my affiliate links
Weatherproof size 14 to 6 Amazon
Weatherproof size 22 to 8 Amazon

Resource
How to select and install connectors
Wire connector wrench
Wrench to apply wire connectors
Tighten connector

Buy:
Wire connector blaster
Twist connector wrenches at Amazon

Resources:
How to twist wire
How to select and install twist-on wire connectors

Buy:
Blue for 16-14 wire
Yellow for 12-10 wire

Resource:
How to install terminals
Treminals

Terminals

Buy:
Terminal kit
Blue for 16-14 wire
Yellow for 12-10 wire
Push on wire connectors

Push-on wire connectors in place of twist-on connectors

Buy:
Push on wire connectors Amazon
Red 3P connector for 10-14 gauge wire
Lever connectors for stranded wire at Amazon
remove cable staple
Buy
End cutting nippers at Amazon

 
linesman pliers
Buy tools:
Wire strippers at Amazon
Linesman pliers
Utility knife at Amazon
End cutting nippers at Amazon

Use solid copper wire
Fire inside timer caused by stranded wire
Keep enclosure door closed at all times
Buy:
soldering guns
Resource

Timer caught fire
      Terminal kit     Terminals:
Crimp terminals onto stranded wire
Solder terminals onto solid wire
Use terminals to connect small wire to contactor
Buy:
Terminal kit at Amazon
Blue terminals for 16-14 gauge wire at Amazon
Yellow 12-10 gauge female terminal 16 pcs
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

How to install tankless recirculation


Install point of use water heater
Titan tankless

Contactors/ relays
Install and troubleshoot garbage disposal Waste King disposal
Programmable timers

Woods timers
surge protection
Anode rods anode rods
Recirculation system

Tankless recirculation
Point of use water heater
Type 1 and type 2 surge protection surge protection
Buy
Electronic parts

Industrial supplies

Tools and home improvement

Home and garden

Hayward pool
Pentair pool

Southwire electric
Buy
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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