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How to wire 3-phase outlets and surge protectionCooper brand outletsIntermatic brand surge protectors Wire color codes at Wikipedia 3-phase wiring Electricians forum Engineering toolbox Estimate line-to-line voltages 3-phase electric meters 3-phase motor wiring diagrams Formulas for 3-phase Line-to-line voltage = line to neutral x √3 3-phase has 2 varieties: 3-wire: three hot wires and no neutral, and 4-wire: three hot wires and a neutral |
 Types of phase wiring |
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277
480 Three
Phase WYE 480 volts across line-to-line 277 volts line-to-neutral
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Voltages are higher or lower based on windings inside the transformer. Power is generated at plant by rotating 3 coils in a magnetic field => power is sent out on 3 lines => power travels over wires to local area => power lines are connected to transformer => power is changed into specific voltage depending on which transformer is installed, and how the transformer is wired. WYE or Delta configuration refers to how the 3-phase transformer coils are wired. Inside each transformer are two coils: Primary coil is connected to power generation side. Secondary coil is connected to service wires that feed the service panel and circuit breakers. If secondary coil is wound in WYE, then power to the service panel will always have a neutral, and two voltages. Read |
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277
480 Three
Phase WYE 480 volts across line-to-line 277 volts line-to-neutral Shows equipment ground |
 Use AG4803CE surge protector |
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Three
Phase 480V 480 volts across line-to-line No system ground Shows equipment ground |
 Use AG4803D3 surge protector |
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Phase 480V delta corner ground 480 volts across line-to-line | |||||
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120
208V 3-phase wye 208 volts across line-to-line 120 volts line-to-neutral |
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120 208V 3-phase wye 3 phase 4 wire 208 volts across line-to-line 120 volts line-to-neutral Shows equipment ground |
 Use AG2083C3 surge protector |
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120
208V 3-phase wye Intermatic AG208C3 Surge |
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 | 208 Volt 3-wire delta 3 Phase 3 wire 208 No Neutral Phase to phase 208V | |||||
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347
600V three phase wye 600 volts across line-to-line 347 volts line-to-neutral |
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347
600V three phase wye 600 volts across line-to-line 347 volts line-to-neutral Shows equipment ground |
 Use AG65033 surge protector |
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347
600V three phase wye Intermatic AG65033 Surge Protection |
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Three
Phase 600V 600 volts across line-to-line No system ground Shows equipment ground |
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Three
phase 250V 250V across each line No ground |
 Use AG2403D3 surge protector |
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120-240
High leg Delta Intermatic AG2403C3 surge protection Black Line to Black Line 240V Black Line to Neutral 120V Red or Orange Line to Neutral 208V |
 Use AG2403C3 surge protector |
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 | 240-480
High leg Delta Phase to phase 480V Phase A Phase C to Neutral 240V Phase B high leg to Neutral 415V Voltages are doubled compared with 120-240 high leg | |||||
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277
480 Volts Single phase With equipment ground |
 Use AG48013 Surge protector |
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277
480 Volts Single phase Intermatic AG48013 Surge |
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| Household
wiring 120volt single-phase and 240 Volt split-phase  Whole house surge Larger image Intermatic IG1240RC3 whole house surge protector/ pdf Protect your business/ Protect circuit breaker panel and 120V and 240V circuits/ protect your tankless water heater, and any water heater with electronics Installed directly into circuit breaker panel/ Replaced after each event Protects circuit breakers, main panel, electric wiring, electronics, appliances Does not protect TVs connected to sattellite dish/ for TVs use surge protector with co-ax TV connector |
Household wiring |
Household wiring |
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How to wire 3-phase timer |
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Buildings
with 3-phase power also have Neutral wire used to power ordinary
120Volt outlets. 1) Use 120 Volt timer. 2) Install 3-pole contactor with 120Volt coil 3) Timer controls 120Volt coil. 4) 3-pole contactor turns 3-phase power ON-andOFF. Examples of this timer: Intermatic EH10 7-day programmable Intermatic T101 24-hour analog Repeat cycle timers Dawn-dusk timer 365-day programmable timers 277Volt 24-hr analog timer |
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Some
timers have dry load terminals. 1) Timer clock is 120 volt. 2) Timer relays are dry and receive no power from clock wiring. 3) This type of timer can be used to control 24Vac power from a transformer. 4) Install 3-pole contactor with 24Volt coil 5) Timer controls 24Volt coil. 5) 3-pole contactor points turn 3-phase power ON-andOFF. Examples of this timer: Intermatic GM series Intermatic ET series |
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3-pole contactor with 120Volt coil at Grainger Example 3-pole contactor with 24Vac coil at Grainger Example 3 & 4-pole 120Volt coil at Zorro Example 3 & 4-pole 24Volt coil at Zorro Example 3 & 4-pole 480Volt coil at Zorro 3-phase industrial timers |
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Countdown |
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 Intermatic trippers and parts |
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Power pack |
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Sylvania timers |
Tork timers and manuals |
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 How to set analog timers |
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Wire GE 15207 timer  |
 GE box timers |
Intermatic EH10 timer |
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Intermatic T1906 and T1905 |
Intermatic T-101 T103 T104 |
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EH40 and WH40 |
Troubleshoot intermatic |
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How to wire Tork DTU40 |
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