NCCER Electrical - Module 26107-20 Hand Bending Flashcards

Vocabulary flashcards covering conduit hand bending terms, offset formulas, bending tools, and procedures for cutting and joining metal and PVC conduit based on Module 26107-20.

90° Bend

A right-angle bend made in conduit.

Stub-up

The rise in a $90^\circ$ bend, which is the length of the bent section of conduit measured from the bottom, centerline, or top of the straight section to the end of the conduit being bent.

Developed Length

The actual length of the conduit that will be bent.

Offset

Two bends placed in a piece of conduit in order to navigate around obstructions.

Segment Bend

A large bend that is formed by multiple short bends or shots.

Back-to-Back Bend

Two $90^\circ$ bends with a straight section of conduit between them made on a single piece of conduit.

Concentric Bends

Bends made in two or more parallel sections of conduit, where the radius of each bend in conduit after the inside bend is respectively increased.

Gain

The distance that is saved by the arc of a $90^\circ$ bend.

Rise

The length of the bent section of conduit measured from the bottom, centerline, or top of the straight section to the end of the conduit being bent.

Hand Bender Conduit Size Range

The conduit sizes that can be bent using a hand bender, which are $1/2\,\text{inch}$ through $3/4\,\text{inch}$.

30° Offset Multiplier

The multiplier equal to $2.0$ used to determine the distance between bends when bending offsets with $30^\circ$ bends.

45° Offset Multiplier

The multiplier equal to $1.4$ used to determine the distance between bends when bending offsets with $45^\circ$ bends.

30° Conduit Shrink Constant

The conduit shrink rate per inch of offset depth when using $30^\circ$ bends, which is $1/4\,\text{inch}$ per inch.

Hickey

A manual bending tool used to bend Rigid Metal Conduit (RMC).

Hot Box

A specialized heating unit tool used for the field bending and forming of PVC conduit.

Hypotenuse

The side directly opposite the $90^\circ$ angle in a right triangle.

Saddle Bend Shrink Rate

The amount of conduit shrink caused by the center of a saddle bend, which is $3/16\,\text{inch}$ for every inch of saddle depth.

Reamer

A tool used to smooth and deburr the cut edges of metal conduit.

Conduit Die Taper

The thread taper cut by conduit dies, which is $3/4\,\text{inch/foot}$.

EMT Hacksaw Blade

A hacksaw blade with $32\,\text{teeth/inch}$ used to cut Electrical Metallic Tubing (EMT).

Pipe Cutter Tightening Rule

The procedure of tightening a pipe cutter handle $1/4\,\text{turn}$ for each full turn around the conduit.

PVC Assembly Rotation

The action of pressing PVC conduit and fitting together and rotating them about a half-turn to evenly distribute cement.

Nylon String

A tool used to cut PVC conduit in place when working in awkward locations.

Ratchet Threader

A tool typically used to cut threads onto Rigid Metal Conduit (RMC).