UL 4-2021 pdf free download.Armored Cable.
5.1.2 A copper conductor shall not be smaller than 14 AWG and shall not be larger than 1 AWG. An aluminum or copper-clad aluminum conductor shall not be smaller than 12 AWG and shall not be larger than 1 AWG.
5.1.3 Each 6 — 1 AWG conductor shall be stranded. Conductors shall comply with the requirements in the Standard for Thermoset-Insulated Wires and Cables, UL 44. or in the Standard for Thermoplastic- Insulated Wires and Cables, UL 83, except as modified in this Section.
5.2 Circuit conductors
5.2.1 The circuit conductors in Type ACHH cable shall be Type RHH or Type XHH complying with the
Standard for Therrnoset-lnsulated Wires and Cables (UL 44).
5.2.2 The circuit conductors in Type ACTH cable shall be Type THW complying with the Standard for
Thermoplastic-Insulated Wires and Cables (UL 83).
5.2.3 The circuit conductors in Type ACTHH cable shall be Type THHN complying with the Standard for
Thermoplastic-Insulated Wires and Cables (UL 83) or insulated conductors that comply with the
requirements for conductors for use in Type ACTHH cable in UL 83 (these conductors have insulation of
PVC or a thermoplastic other than PVC and do not have a nylon jacket).
5.2.4 Surface marking of the conductors indicated in 5.2.1 — 523 is not required, however, they shall not be marked with any designation such as THWN, THW, or RHW that indicates that they are for use in wet locations.
5.2.5 Conductors shall be without splices or joints of any kind within the armor, other than those that comply with the requirements for splices and joints in the applicable standard mentioned in 5.2.1 — 5.2.3.
5.3 Grounding conductor
5.3.1 One or more grounding conductors are acceptable in a cable but are not required. Each grounding conductor shall be either of the same construction as the circuit conductors, or an uninsulated copper or aluminum conductor with or without a paper covering. A maximum of one uninsulated grounding conductor is acceptable in a cable. Each grounding conductor shall be cabled with the circuit conductors and shall be entirely in one location In the cable — that is, it shall not be divided into two or more parts cabled separately or distributed helically — and, if insulated, shall be identified as Indicated in 17.4. Each grounding conductor shall not be smaller than indicated in Table 5.1 or Table 5.2. Provision of an uninsulated grounding conductor with or without a paper covering or insulated grounding conductors does not remove the need for the aluminum bonding strip required in 7.6.1.UL 4 pdf download.