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Figure volts amps watts for water heater 9 Ways to save with a water heater Do-it-yourself Water heater is tripping breaker
2014

How to wire under counter water heater

Buy:
Under counter water heaters at Amazon
Point of use water heaters at Amazon

Under-counter/ point-of-use water heaters shown here are electric
What size do you need? If you need to run out 1 gallon before getting hot water, then use 3 gallon under-counter

120V hardwire

3/4" connections

2 to 20 gallons

Same-day repair; using generic parts (except marathon)

Repairable by homeowner

Bradford White point of use water heater
Bradford White 
6 gallon
6 year warranty
Buy
Top connection at Amazon
Side connection Amazon
Bradford White heaters
Resource:
Bradford manual
Reliance water heater
Reliance
6-10 gallon
Side connections/
6 year warranty
Buy
Reliance water heaters
Reliance dort
Reliance dors
Resources
Reliance manual
State manual
American tiny titan water heater
American
6-12 gal
Top connections/
6 year warranty
Buy
American tiny at Amazon
Resource:
American manual
State point of use water heater
Rheem
2-6-10-20 gallon
Side connections/
6 year warranty
Buy
2 gallon at Amazon
2.5 gallon at Amazon
6-10-20 gallon at Amazon
Rheem point of use
Resource:
Rheem manual
Marathon point of use water heater
Marathon
15-20 gallon
Top connections/
Lifetime tank warranty
Non-Generic parts
Buy
Marathon at Amazon
Resource:
Review Marathon
Marathon installation

Plug into 120V 3-prong outlet

Temperature control on front

2.5 - 6 gallon

Non-generic parts

Repairable

Ariston water heater
Ariston / Bosch
2.5 - 4 gallon
Top connections/
2 year warranty
Buy
Ariston at Amazon
Bosch at Amazon
Resources
Ariston resources
Bosch P10 P5
State point of use water heater
State / Reliance
American/ are all AO Smith
2.5 - 6 gallon
Top connections/
6 year warranty
Buy
State 2.5 gal Amazon
American 2.5 Amazon
Reliance 6 gal Amazon
Resource:
Reliance manual
Waiwela awter heater
Waiela
2.5 - 4 gallon
Top connections
6 year tank warranty
Buy
Waiwela at Amazon
Resource:
Waiwela mini tank
Emax point of use water heater
Eemax
1.3 - 2.5 - 4 - 6 gallon
6 year tank warranty
Buy
Eemax water heaters
Chronomite 2.5 gallon
Resource:
Eemax manual/ parts
Stiebel-Eltron point of use
Stiebel Etron
2.5 - 4 gallon
Top connections
2 year warranty
Buy:
Stieble 2.5 gal at Amazon
Stieble 4 gal at Amazon
Resource
Steible 2.5 manual

Tankless

120-240V hardwire
30 amp 10 gauge wire
Must be dedicated circuit with no other load on breaker Some repairs possible

Tankless units are always connected to incoming cold water line.
Tank-type heaters shown above are connected to either hot or cold incoming water.
Bosch point of use water heater
Bosch 3.4
Tankless
Hardwire 120 Volt
Buy
Bosch 3.4 120V
3400 watt/ 30 amp
Bosch 9.5 240 Volt
9500 watt/ 40 amp

Resource:
Bosch powerstar manual
Eemax point of use water heater
Eemax
Hardwire 120 Volt
7" x 11" x 3"
Buy
Eemax SP3512 120V
3500 watt/ 30-40 amp
Eemax SP35 240Volt

Resource
Eemax tankless manual
Sell sheet with wire size chart
Troubleshoot
Ecosmart point of use
Ecosmart
Tankless
Hardwire 120 Volt
7" x 11" x 3"
.25 gpm
Buy
Ecosmart 3.5 POU 120V
3500 watt/ 30-40 amp
Ecosmart 6 POU 240Volt
6000 watt/ 30-40 amp

Resource:
Ecosmart manual
Stieble Etron point of use
Stieble Etron Mini
Tankless
Hardwire 120 Volt
Buy
Stieble mini 120V Amazon
3000 watt 30 amp
Stieble mini 6 240 Volt
5700 watt 30 amp
Stieble DHC 3-1 120 Volt
300 watt 30 amp
Stieble DHC 6-2 240 Volt
6000 watt 30 amp

Resource:
Steible Eltron mini manual
Stieble DCH manual
Chronomite tankless water heater
Chronomite
Hardwire 120 and 240V models
Buy at Amazon
120 Volt 20 amp Amazon
120 Volt 30 amp
240 Volt 30 amp

Resource:
Chronomite manual
water heater circuit How to wire under counter water heater to same 15 or 20 amp line that goes to dishwasher.

Using FM1 either-or timer
Either the water heater has power -or- the dishwasher has power
But not both at same time
FM-1 timer
Larger image
I used 14 gauge wire since circuit breaker was rated 15 amp.
Example wiring:

1) Buy plastic box with 3/4 Knockout.
2) Use 3/4" male adapter so all 3 wires enter box from same knock-out.
3) Attach timer with self-tapping screws.
4) Remove timer from box to connect terminal ends
5) In this illustration, I trimmed the ground wires shorter and re-applied wire connector so all wires could fit into box before putting cover over box.
6) Attach box next to water heater. Make box accessible so times can be changed. Timer must be re-set to current time after power outage.
FM-1 sell sheet with model numbers
More information below:
Electrical capacity calculation:
1) 15 amp breaker with 14 gauge wire is recommended at 80% rated load = 12 amp load.
2) 20 amp breaker with 12 gauge wire is recommended at 80% rated load = 16 amp load.

3) Typical dishwasher is 720 Watts and draws 6 amps (look at label inside door on dishwasher)
4) Typical under counter water heater 2-1/2 gallon to 20 gallon is 1500 Watt and draws 12.5 amps.

5) Combined load for dishwasher and water heater is 2220 Watts and 18.5 Amps.
Dishwasher and water heater should not be turned ON at same time.

Objective
: wire both 120V dishwasher and 120V water heater so neither will turn on at same time

Objective: inexpensive, reliable solution that doesn't require much space and is simple to wire, simple to program and handles job with no chance for error.

1500 Watt 2-1/2 to 6 gallon

1500 watt 20 gallon
Solution: Intermatic/Grasslin FM1 120V dial timer with NO and NC connections.
Low heat, low amperage timer, 3 watt timer. Intermatic quality. Small size. 120 volt, easy wiring using crimp-on terminals.
Run water heater only when needed.
See FM1 timer at 1000 bulbs for $27.73
FM1 at Nextag
Terminals
Read: Terminals
FM1 Intermatic timer
FM1 timer Manual
What are NO NC connections? They are like a 2-pole light switch. When one is OFF, the other is ON. And they are never ON at same time.
With NO NC connections, either the dishwasher has power or the under-counter water heater has power. But neither at same time.
Choose convenient times to run either appliance. For example after lunch you want to operate dishwasher, but no longer need water heater. And then water heater can remain OFF until shortly before before next meal. This is possible using FM1 Intermatic timer shown below.
1) Easy set pins let you schedule optimal times for water heater.

2) NO NC terminals mean water heater and dishwasher can never be ON at same time.

3) Trippers on dial are set in or out to set times. 15 minute intervals for exact times. Change schedule any time.

4) 21 Amp capacity meets project specifications. 21 x 80% = 16.8 amps. Handles 1500 watt water heater or 750 watt dishwasher.

5) Rotate dial until current time lines up with arrowhead located on inner dial.

6) Mount timer inside square plastic box available from home center.
Room for wires and wire connectors. Put cover over top when finished.
 Cost for electric wiring $45  

How to install under counter water heater
Input 1 and 2 are to operate the timer clock motor
NO and NC terminals are marked 4 and 5
Instructions for wiring:

1) Disconnect 120V cable going to dishwasher.
Cable has Black Hot wire and White neutral wire.

2) Black Hot wire and White Neutral wire connect to terminals 1 and 2 on FM1 timer. This will power clock motor

3) Black Hot wire from breaker box also connects to terminal 3. This will send power to the switch.

4) Water heater connection: Black wire to water heater connects to terminal 5. This is the NC or normally closed terminal. This terminal has power when timer switch is OFF. This means water heater can run continuously for all hours of the day except a few hours each day when dishwasher is expected to operate. White wire to water heater connects to other white Neutral wires.

5) Dishwasher connection: Black wire to dishwasher connects to terminal 4. This is the NO terminal or normally open terminal. This terminal has power only when timer is turned ON.  White wire to dishwasher connects to other white Neutral wires.

6) How to make terminal connections
Yellow for 12 gauge wire; Blue for 14 gauge wire

Since NO and NC terminals are never ON at same time, then water heater and dishwasher can never be ON at same time.
Alternate timer solution: GE 15207 timer
GE 15207 Timer GE 15207 timer from Home Depot has NO and NC terminals

Link below shows dip switch configuration
How to wire GE 15207 timer for 120V and 240V Water heater
GE 15207 wiring.
Set dip switches for 120 Volt before applying power to timer.

Hot wire arrives from breaker and connects to clock terminal
Jumper wire connects Hot to COM terminal
Dishwasher is connected to NO terminal
Water heater is connected to NC terminal

Neutral arrives from breaker box and connects to clock terminal.
All Neutral wires join on same terminal

All ground wires are joined together
Alternate timer solution: T1905 timer
Intermatic T1906
Large image of 120Volt T1905-6
T1905 is 120Volt timer with NO and NC terminals
Read T1905 manual
T1906 & T1905 at Intermatic
T1905 for 120 V at Grainger


T1905 is 240 Volt/ Not the correct timer for this project
Read T1906 manual
T1906 & T1905 at Intermatic
T1906 at Electric Supplies on-line
Wiring diagram for T1905

Connect 120 Volt water heater as shown

Add dishwasher:
Connect dishwasher black wire to NC terminal.
Connect  dishwasher neutral wire to other white neutral wires.


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 electrcial repairs

Resource:
Basic house wiring

Non-contact voltage tester

Test for power without touching connectorss
NEVER assume power is OFF
Buy:

Non-contact voltage tester Amazon
Electric testers at Amazon
 
Resource:
How to test electric power is off

Resource:
How to install terminals
Treminals

Terminals

Buy:
Terminal kit
Blue for 16-14 wire
Yellow for 12-10 wire
Read about terminals
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 twist-on wire 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
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
add solder to stranded wire

Turn stranded wire into solid wire

Add solder to 1" length of tightly twisted stranded wire to make into solid wire
Heat wire. Touch solder to wire. Let cool. File away over-solder.
Buy:
soldering guns
Resource

Timer caught fire

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

Fire inside timer caused by stranded wire
Keep enclosure door closed at all times

Fire caused by stranded wire

Do not use stranded wire under screw plate

Applies to timers, switches, outlets, pumps etc.
Small devices, with small loads, such as lamp socket, stranded wire is fine
Add solder to 1" length of tightly twisted stranded wire to make into solid wire
Heat wire. Touch solder to wire. Let cool. File away over-solder.
Buy:
soldering guns
Resource

Timer caught fire

Basic household wiring
Basic water heater circuit

Figure volts amps watts for electric water heater
Test elements
Replace elements
How to wire tankless electric
How to change water heater temperature using timer
Change water heater from 240Volt to 120Volt
Replace thermostats
How to wire thermostats
How to wire water heater for off peak operation

How to twist wire
How to wire Cooper 277 pilot light switch
How to wire combo switch-outlet
How to replace 3-speed fan switch
 

How to wire dimmer
How to wire 3-way dimmer
How to wire occupancy switch
How to wire motion detector
How to wire TM811 and TM8111 switches
How to wire wall timers
How to wire box timers
How to wire off-delay timer
Wire off-delay timer
How to wire pin timers

How to wire and troubleshoot photo eyes
Reverse photoeye so it turns on in day
24 Volt photoeye
24 volt programmable timer

How to wire switches
How to add switch
How to add 3-way switch


Timer for 3-way switch
Timer for 4-way switch

How to add outlet 
How to wire 3-way switches
How to wire 4-way switches


Troubleshoot Malibu outdoor lights
Terminals 
Select and install wire connectors
Select wire size

Electrical formulas
Electricians forum
 

Electrical pages


How to wire arc fault breaker
How to wire GFCI
How to wire GFCI combo

Basic water heater circuit
How to wire water heater for 120Volt
Install old work box

How to drop wire from attic
Wire connector

How to wire 240volt outlets
How to install 3-phase timer
How to wire 3-phase outlets
How to wire 3-phase surge protector
What is 3-phase

How to wire whole house surge protector
How to wire under-counter water heater
 

See inside main breaker box
Replace breaker
Install subpanel

Fuseholder
Contactors
How to solder wires
Whole house surge protector
3-phase surge protection
Circuit breakers

Difference between 120 volt and 240 Volt
Difference between 50Hz and 60Hz
How to install electric meter on water heater
How to wire water heater thermostat
How to wire water heater with switches and timers

6x6x4 Enclosures
Intermatic timer enclosures

Convert AC water heater to DC
How to wire DC solar water heater
DC relays for solar water heater
How to add another thermostat to water heater

How many Kwh to heat water
Chart for figuring heating time for electric heater
How to wire Intermatic T100 series and T170 series timers
How to wire Intermatic Sprinkler timers
How to wire WH40, EH40, EH10, WH21 timers
How to wire Intermatic ET series timers
How to wire Intermatic GM40 and WHQ timers
How to wire T1906, T1905, T1975, T1976 timers
How to wire Intermatic ST01C, Ei600, EJ500 timers
How to wire Intermatic/Malibu timers
How to wire Intermatic FM1 timer
How to wire Intermatic PB300 series timer
How to wire Intermatic whole house surge
How to wire remote control timer
How to wire 3 phase timer
How to wire GE 15312 timer
How to wire GE 15207 timer
How to wire GE Box timers
Gas and electric water heaters 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
Troubleshoot gas water heater
Troubleshoot electric water heater
Intermatic control centers Intermatic control centers:
+ manuals and parts


Including Z-wave
box timers Compare box timers

Control with Z-wave
programmable timer Compare programmable timers

Control water heater with programmable wall timer
Countdown timers Compare countdown timers

Control water heater with countdown timer
Compare power packs

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