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Galvanized interlocked armor (GIA), aluminum interlocked armor (AIA) and TECK90 cable systems offer engineers and specifiers a cable system with built-in environmental protection for all types of electrical circuits. They are used whenever mechanical protection is needed: instrumentation, control, communication or power distribution applications can all use armored cable.
Metal clad (MC) armored cables are covered in UL 1569 and can include the following construction types:
In North America, armored cable products like AIA, GIA, TECK90 and CCW constructions each offer their own distinct advantages and deliver maximum performance and ease of installation for a broad range of commercial, industrial and utility applications. The unique characteristics of these all-in-one cable assemblies provide an alternative to the traditional labor-intensive cable-in-conduit installation methods. Continuously corrugated welded (CCW) aluminum sheath constructions have excellent crush, heat, moisture and chemical resistance to meet the requirements of harsh industrial conditions and are suitable for installation in Class I, Div. 1 hazardous locations.
MV armored cables are by convention manufactured in three color-coded jackets. 600-volt jackets are black and 5 kV cables have yellow jackets. In the U.S., 15 kV cables are red. In Canada, 15 kV cables are orange.
CCW armor is made by forming an aluminum strip into a circle along its length and then welding it at the seam. This smooth tube is then rolled or crimped to form ridges in order to prevent kinking while bending. This MC type of armor provides an impervious seal against moisture and other chemicals. CCW is an excellent choice for VFD (variable-frequency drive) motor drive applications where the armor offers electromagnetic benefits.
MC-HL (Metal Clad Hazardous Locations) cable is recognized by the NEC as suitable for installation in Class I, Div. 1 hazardous locations in voltages ranges from 600 V to 35 kV. A similar type of construction is available in a 300 V construction as type ITC-HL.