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24 volt zwave
480 volt zwave
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277
volt Zwave 24 volt zwave 480 volt zwave |
 FS20Z z-wave moduleIncoming power 120 volt AC Control 24-120-240-277 volt AC up to 20 amps Use module to control contactor or relay for most reliable result Do not over-amp the device or non-resettable internal fuse will trip 277 volt Z-wave switch 24 volt Z-wave switch Some versions have yellow wire for AS101 auxiliary 3-way switch/ Buy: FS20Z zwave module Resource: manual |
 Larger image Use 30 amp fuse |
Control
3-phase 277V-480V with WZ4004 Connect white neutral to terminal 1 Connect first Hot leg to terminal 2 ... use 30 amp line fuse Add jumper wire from terminal 2 to terminal 3 Connect other Hot leg to terminal 5 ... use 30 amp line fuse Connect wires going to 3-pole contactor to terminals 4 and 6 Contactor has 480Volt coil Or choose contactor with 277V coil. Difference: Only 277V enters CA3750 and connects to terminals A and B as illustrated. No hot wire connects to terminal 3, contactor wires connect to terminals 1 and 4 Resources: Read about 3-phase electric How to wire 3-phase timers Resources for 3-pole contactors |
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2-pole
40 amp contactor With removable dust cover on top. Select correct voltage needed to control coil. Water heaters typically use 240 volt coil, HVAC replacement is 24 volt coil. Typical 2-pole contactors are rated with 24, 120, 208-240 volt coils. Three pole contactors for 3-phase are available in more coil voltages not found in residential applications such as 277, 480 etc. Using the wrong coil voltage will cause problems. Selecting a contactor rated for more amps is better, so using 240 volt 40 amp contactor for 240 volt 30 amp water heater is fine. Buy 2-Pole 40A resistive 120Volt coil 40 amp 240Volt coil 24 volt coil Packard contactor Mars 2-pole and 3-pole contactors Rheem HVAC replacement contactors 50 amp contactor 60 amp contactor Resource: Fasco info sheet 3-pole contactors |
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Contactor
safety All wire connections must be inside enclosure with cover. 2-pole 40 amp contactor in 6x6x4 enclosure Using #8-32 x 3/4" bolts Install contactor at angle leaves room for wire This is DPST contactor Double pole, single throw. So the contactor is double pole, or 2-pole. It can turn off 2 wires. And single-throw because both poles are on-off at same time. So you can switch both wires in 240 volt circuit. Buy: 6x6x4 pull box 6x6 enclosures Resources:  How to wire contactor for water heater Types of enclosures Compare types of enclosures |
| 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 |
 Buy: Armored cable |
 Southwire armored cable cutter Buy: Rolls of stranded wire |
Stranded wire  Buy: Rolls of stranded wire |
50-60
amp breaker use 6 gauge /  Buy: 6-2 wire Southwire electric tools NMB is house wiring UF is underground |
40-50
amp breaker use 8 gauge / 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 |
 Buy: Multimeter Electrical testers |
 Contactors/ relays |
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