Conductor Ampacity p2

Terms for Insulation Materials

Compound for CPE Jacketing made of chlorinated polyethylene.

Ethylene Propylene Rubber is an ozone-resistant rubber composed of EPDM.

Retardant to flames

A substance that is added to insulation materials to reduce their flammability, like antimony oxide (in PVC) or aluminum tri hydrate.

Flame Retardant

A material's ability to prevent combustion from spreading at a slow rate of motion, preventing flame transmission.

MTW

Insulated by thermoplastic machine tool wire: 90 to 105 °C, 600 volts.

Nylon

A class of polyimide polymers used to coat wire and cables.

Non-Polluting PVC

A polyvinyl chloride composition without plasticizer migration, which causes electrical contamination.

Polyester

A high-strength, resistant-to-moisture material employed as a cable core wrap is made mostly from polyethylene terephthalate.

Polyethylene

A thermoplastic substance that is ethylene that has been polymerized.

Polymer

A material composed of several chemical units of molecules that repeat i.e. Plastic, rubber, or elastomer.

The thermoplastic polymer containing propylene is known as polypropylene.

Polyvinyl Chloride (PVC) is a thermoplastic substance made of vinyl chloride polymers. Depending on the formulation, PVC can be either rigid or elastic.

First-level insulation

The initial layer of non-conductive substance used to cover a conductor, which serves primarily as electrical insulation. Thermoplastic polyvinyl chloride, or PVC, is a polymer frequently used for insulating and jacketing wire and cable during construction.

RH Type is a conductor with rubber and XLP insulation used in dry environments at 75°C.

A conductor of type RHH designed for usage at 90 °C in dry environments and insulated with rubber or XLP.

RHW Type is a conductor with rubber and XLP insulation for usage at 75 °C in dry and wet environments.

RHW-2 Type, a conductor with rubber and XLP insulation for usage at 90 °C in both dry and wet environments.

Additional Insulation

A primary insulating layer covered with a high-resistance dielectric substance with a flame to prevent abrasion.

Self-Extinguishing

A property of a substance whose flame goes out once the ignition source is put out.

SIS

Identifies a single conductor with synthetic thermosetting insulation in a heat-, moisture-, and flame-resistant grade. Polyethylene insulation that has been chemically cross-linked is also used. 90°C used only for switchboard wiring.

SO-SEO

Hard service cord, 600V, 60° to 90°C, identical structure as type S, but with an oil-resistant neoprene jacket.

Service cord with oil-resistant insulation, weather resistance, and an oil-resistant jacket (SOOW). Water resistant as well 600V.

Hard service is jacketed but made entirely of plastic. 600V, sixty degrees Celsius to 105 degrees Celsius.

Stabilizer

PVC has a metallic additive to keep the insulation compound's integrity during processing and use.

STO

Thermoplastic outer jacket that is oil resistant. 600V, 60°C.

STOW

Weather- and oil-resistant service cord with a thermoplastic jacket. STOW has received CSA clearance for usage outside. Can withstand water. UL 600V.

Sunlight Repulsion

The capacity of a conductor and cable insulation to withstand deterioration brought on by UV radiation.

TFFN Fixture wire has been stranded, wrapped in a nylon sheathing, and coated with thermoplastic.

Nylon-jacketed construction wire THHN 90C, 600 V, for use in both dry and wet environments.

THHN-2

The inaccurate allusion is frequently misused when THHN-2 is mentioned. Building wire with thermoplastic vinyl insulation. Heat, moisture, and flame resistance. 75°C. Both dry and moist areas.

XHHW-2

Building wire with a small diameter, polyethylene jacket, chemical cross-linking, and high temperature (90°C).

XLP

Polyethylene that is cross-linked.

8.3 Terms for Conductor/Cable Tests

Consistency Check

A test that establishes whether or not an electrical current runs continuously through an entire single wire or each wire in a cable.

Diathermic Test

A test determines whether or not the insulation is adequate in typical conditions by applying, for a predetermined amount of time, a voltage greater than the rated voltage.

The flammability test is a test to measure a cable's ability to self-extinguish after being removed from a heat or flame source and to resist ignition.

Heat stroke

An evaluation is used to assess whether or not a substance is stable after being subjected to a rapid increase in temperature for a brief amount of time.

Hi-Pot is a test used to determine how much electricity can be put on a conductor before the insulation breaks down.

Cycle of Life

A test to estimate the time to failure in a managed, typically expedited setting.

A spark test is a test that is designed to find flaws (often pinholes) inside the insulation of a cable or wire by applying a voltage over a very brief period when the wire is pulling itself across the electrode field. This test is known as a "spark test."

A dielectric voltage testing called a tank test involves submerging the test sample in water and applying a voltage between the Conductor & the water as the ground.

8.4 Manufacturing terminology

An annealing is used to increase the tensile strength and decrease the yield stress of metal. The annealing process makes copper less brittle.

Drawing

In the production of wire, the metal is passed through the die sequence to achieve the desired diameter reduction.

Extrusion

The procedure of constantly putting a conductor core made of plastic or elastomer and pushing it through a die to coat it in insulation or a jacket.