Wiring Written Final

What is the multiplier for a 10 degree offsest?

x 6

What is the multiplier for a 22.5 degree offsest?

x 2.6

What is the multiplier for a 30 degree offsest?

x 2

What is the multiplier for a 45 degree offsest?

x 1.4

What is the multiplier for a 60 degree offsest?

x 1.2

Where would a photocell be used?

It can be used to automatically turn lights on at night and off during the day. Places where it would be used would be streetlights or outdoor lights.

What is an occupancy used for?

An occupancy sensor is used to detect people in a room by looking for motion or sound. It is commonly used in office spaces, bathrooms or classrooms.

What is 0-10v dimming when used in luminaries?

It is commonly used in LED lights and commercial lighting systems. A dimmer switch sends the voltage signal and the fixture dims accordingly.

What is a NAC circuit?

Notification Appliance Circuit

What is a EOLR

End-of-Line Resistor

What is the shrink for a 10 degree bend?

1/16” per inch of rise

What is the shrink for a 22.5 degree bend?

3/16” per inch of rise

What is the shrink for a 30 degree bend?

1/4” per inch of rise

What is the shrink for a 45 degree bend?

3/8” per inch of rise

What is the shrink for a 60 degree bend?

1/2” per inch of rise

How far from a box does emt need to be strapped?

3 feet from a box and every 10 feet after that

What type of emt connector is required outside?

Rain tight connector

What is the volume of a 4 square box?

21 cubic inches

What is the volume of a 4 square deep box?

30.3 cubic inches

How many degrees of bends can you have in a run of emt?

360 degrees

What is overcurrent protection?

Overcurrent protection stops too much electricity from flowing by shutting off the circuit using fuses or breakers

Can you use a fuse that is rated for 300v on a 480 system?

No

What is an overload when dealing with overcurrent protection?

An overload is when devices use too much electricity for too long and protection shuts off the power to stop damage

What is a short circuit?

A short circuit is when electricity takes a shortcut with very little resistance, causing a big surge of current

What does it mean when a breaker has a marking that says 10k AIC?

It means the breaker can handle 10,000 amps without getting damaged

______ connected means a connection of three single phase transformer windings to a common point with the other end of each winding connected to the line conductors

Wye

What size screw is used when attaching a receptacle to a single gang mud ring?

6/32

What color is circuit 39 on a 120/208 system?

Red

What is the difference between a multiwire branch circuit and a branch circuit?

A branch circuit is a regular circuit that carries electricity from the panel to devices like lights or outlets, usually using two or three wires, and a multiwire branch circuit shares one neutral wire between two hot wires from different phases, saving wire and reducing heat.

What is a batwing used for?

It’s used to secure conduit, armored cable, portable cords, communication cables to a wire or rod

What are strapping requirements for 12-2 MC?

12 inches out of a box and every 6 feet after that

What will your meter display if you are measuring voltage across a fuse that is working properly?

0v

What will your meter display if you are measuring voltage across a closed switch that is controlling a 120v light fixture?

0v

T or F Mud rings have a volume that adds to the total volume of a box?

True

T or F Raised covers have a volume that adds to the total volume of a box?

True

Draw a high leg delta

What is a the purpose of a conduit seal that would be used in Class 1 Div 1 location?

Stop fire, explosions, and gases from moving in or out of a pressurized enclosure.