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Install wire to old work box
How to drop wire from attic into old work box


Test for breaks in wire/ Test for voltage
Most appliance require 80% rated voltage to function correctly
Multimeters at Amazon
Electric testers at Amazon
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

Basic house wiring

Non-contact voltage tester

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

Twist-on wire connector assortments

Do not reuse old connectors
Connector assortment at Amazon
Connector assortment at Amazon
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

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

Wire connector blaster
Twist connector wrenches at Amazon

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

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

How to install terminals


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

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

linesman pliers
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
End cutting nippers at Amazon

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

Timer caught fire
old work box
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Old work box is installed in hollow part of wall
Can be installed on any interior wall
Do not locate where pipes, otherwires, or pocket doors are present.

Wire is dropped into wall, and then hole is cut for box.
Do not cut hole for box before dropping wire.

Old work box at Amazon
Wire wire at Amazon
Select wire and breaker size
install 2 old work boxes
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Drop wire from attic before cutting hole for box.
Once wire is dropped down inside wall, have helper rattle wire around.
Noise from wire will confirm location to cut hole.
Helper pulls wire up out of way so saw will not cut wire.

Cut 2-1/4" x 3-3/4" hole in sheetrock using knife or saw
Reach in and find electric wire inside wall
Pull electric wire through hole
Feed wire into box
Set box into hole
Turn screws so pop-up fin tightens against inside of sheetrock
Install switch.

Note: Water Heater Timer requires only one box and one wire.

attic wiring Instructions for locating where to drop wire:
1.Before going in attic, choose wall for switch
2. Avoid walls with pocket door or plumbing pipes or exterior walls with insulation
3. Go in attic and estimate location of wall

Wear protective mask around insulation

4. Pull back insulation & find top plate as shown.
5. Each interior wall will have double 2x4 top plate that will be visible when insulation pulled back.
6. Have helper tap on wall from below
7. Note location of other wires. Do not use drill next to other wires or damage to wire can occur accidently.
If another wire already drops through top plate where you want your wire, see if your wire will push through same hole.
If you have to drill, move over several inches from other wires so drill won't contact wires.

When drilling through top plate 3 things may occur:
1.) You may hit a nail > drill another hole
2.) You may hit top of upright 2x4 > drill another hole
3.) You may drill into the wrong cavity > that's why you drill through top plate before cutting hole in sheetrock

Tip: after drilling hole in top plate - and - before cutting hole in sheetrock, drop your wire into wall and have helper rattle it around to make sure you're in the right spot. Put timer at eye-level so it's easy to program.
drop wire from attic Cut-away view of residential wall
1) Drop wire through top plate.
2) Have helper rattle wire inside wall
3) Noise from rattling wire will identify where to cut hole for box
4) Try to identify mid-way between studs so blade will not cut existing wires.
5) Existing wires will be stapled onto 2x4's

Do not cut wire accidently


Black and Decker
drop wire from attic Other wires can be inside same wall
1) By code, other wires are stapled to 2x4's
2) However, not every home has code wiring
3) Existing switches and outlet boxes will be attached to 2x4
4) Wires also run horizontal through walls
5) Horizontal wires usually located below level of outlet box ... BUT can be anywhere inside a non-code structure

Be careful When cutting through wall to install old work box:
Do not put blade far inside wall where it can hit other wires and possible pipes
Use a utility knife to cut hole
Cut hole slowly
Locate old work box in center between 2x4s
Buy deep scan stud finder:
Deep scan stud finders at Amazon

Basic 120Volt wiring inside wall
Larger image
Other wires can be inside same wall
Be careful when cutting through sheetrock to install old work box
Do not push blade too deep past sheetrock

Buy deep scan stud finder:
Deep scan stud and electrical and metal finders at Amazon


How to wire switches
Basic house wiring
Water heater timer
Larger image
Family chart for setting timer
GE 15070 timer to control water heater
Compare all timers with same features
Eye-level installation: easy to change times, set override, reset current time after power outage and seasonal time-change, and turn water heater ON-and-OFF manually to override timer function.
30-minute timer intervals: Summertime 15-30 minutes for shower, wintertimer 30-45 minutes for shower.
Image shows timer mounted on wall below attic light switch. Timer is same size as typical light switch

See timer installation
Back to Page 2: Connect wires
Install Box support

How to install Box support
Switch Box Supports

surface-mount extension ring
      Indoor steel                    Outdoor aluminum                     Decorative indoor plastic box
Add surface-mount box or extension ring to in-wall box
Apply over top of any wall box
Run surface conduit to any other electrical device
Raco steel extension ring
Outdoor extension ring
PVC extension ring
Outdoor surface mount outdoor box
single gang extension ring

Junction boxes
Bud Industries boxes at Amazon
Boxes from Attabox
Arlington boxes at Amazon
Hammond project boxes
More enclosures
main breaker box
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See inside main breaker box
Electricity leaves power plant What is 3-phase electric: power plant to end user

How to wire 3-phase timer
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