UL4 STANDARD FOR SAFETY Armored Cable
scope
1.1 These requirements cover interlocked steel or aluminum armored cables that contain 2,3, or 4,14-1 AWG insulated circuit conductors with or without grounding conductors and are for use as Type ACArmored Cable in accordance with Article 320 and other applicable parts of the National Electrical Code(NEC),ANSI/NFPA70.
1.2 These requirements cover cables for use at potentials of 600 v or less and at temperatures that arenot higher than 75°C (167°F) for Type ACTH, or 90°C (194°F) for Types ACHH and ACTHH, dependingupon the temperature rating of the insulated conductors used. Cables with aluminum armor are suitableonly for use with connectors other than the direct-bearing set-screw type and only in alternating-currentcircuits.
2References
2.1 Any undated reference to a code or standard appearing in the requirements of this standard shall beinterpreted as referring to the latest edition of that code or standard.
2.2Wherever the designation" UL 1581" is used in this wire standard, reference is to be made to thedesignated part(s) of the Reference Standard for Electrical Wires, Cables, and Flexible Cords (UL 1581).
2.3 Wherever the designation of "UL 2556" is used in this wire standard, reference is to be made to thedesignated part(s) of the Standard for Wire and Cable Test Methods, UL 2556.
2.4 Wherever the designation to “UL 2885" is used in this wire standard, reference is to be made to thedesignated part(s) of the Outline of Investigation for Acid Gas，Acidity and Conductivity of CombustedMaterials and Assessment of Halogens.
3 Units of Measurement
3.1In addition to being stated in the inch/pound units that are customary in the USA, each of therequirements in this standard is also stated in units that make the requirement conveniently usable incountries employing the metric system (practical SI).Equivalent - although not necessarily exactlyidentical - results are to be expected from applying a requirement in USA or metric terms. Equipmentcalibrated in metric units is to be used when a requirement is applied in metric terms.
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