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Z-wave countdown timer
Home automation
z-wave switch
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Neutral required:
This plan draws hot and neutral from any outlet box.
Applies to zwave home automation devices.

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Zwave switch
install water heater timer Project overview: Requires Neutral
Use any programmable timer, zwave or wifi device that is rated for resistive load.
Use Hot and Neutral from nearby 120 volt outlet to power device.
Rule of thumb: Outlet box will always have Hot and Neutral, Switch box will always have Hot but not always Neutral, Ceiling box with light will always have Neutral but only has Hot when light is on.

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Programmable timer
Countdown timer
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Wifi switch

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Neutral Required
Basic 120-240 volt AC circuit
Understanding the basic 120-240 volt AC circuit is important for electric wiring.

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Programmable timer
Countdown timer
Zwave switch
Wifi switch

Resource
See inside main breaker box
Off delay timer
Delay timer wiring
How to wire AH3 delay timer

How to wire pin timers
Levitonwireless momentary switch Dayton off delay timer Leviton WSS10-GDW Wireless Momentary Switch
Works with occupancy sensor
Momentary switch can activate delay timer like Dayton shown below
Leviton momentary switch at Amazon
How to wire AH3 delay timer
Horsepower rating on electrical device
Timers,  contactors, switches, etc all have a amperage rating.
Timers intended for use on motor loads also have a horsepower rating
The horsepower rating makes it easy to select correct timer.
But many electrical devices do not have a HP rating, and give only amp rating.
Other devices specify they cannot be used for inductive (motor) loads.
Always read product manual for specifications
Calculate amp rating of motor
Motors use more amperage when starting. This is called inrush and occurs for a fraction of a second. The extra amperage is needed to 'set up a magnetic field surrounding the motor and overcome lack of angular momentum of motor and load.'
Inrush can be calculated within a range using information from the motor nameplate.
The nameplate should show Voltage, Locked Rotor code per horsepower, and HP.
Using NEMA Locked Rotor Code Table, locate letter code that matches motor nameplate. Codes generally follow the alphabet with A having the lowest starting current (current = amps). The range will be two numbers such as 4.5 to 5.6 for letter D.
Multiply each number times 1000, then divide each number by Voltage to find range of inrush per HP.
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