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ASTM B787/B787M-04(2014)
Standard Specification for 19 Wire Combination Unilay-Stranded Copper Conductors for Subsequent Insulation
Automaticky přeložený název:
Standardní specifikace pro 19 Wire Kombinace Unilay-pletl měděné vodiče pro následné izolace
NORMA vydána dne 1.9.2014
Informace o normě:
Označení normy: ASTM B787/B787M-04(2014)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.9.2014
Kód zboží: NS-8120
Počet stran: 6
Přibližná hmotnost: 18 g (0.04 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM B787/B787M-04(2014) :
Keywords:
ICS Number Code 29.060.20 (Cables)
Doplňující informace
| 1. Scope | ||||||||||||||||||
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1.1 This specification covers bare combination unilay-stranded conductors made from round copper wires, either uncoated or coated with tin or lead alloy for insulated conductors for electrical purposes. These conductors shall be constructed with a central core wire surrounded by two layers of helically laid wires, resulting in an outer diameter equal to the compressed-stranded equivalent conductor. (See Explanatory Note 1 and Note 2). Note 1: For the purpose of this specification, combination
unilay conductor is defined as follows: a central core wire
surrounded by a layer of six helically laid wires of the same
diameter as the core wire with a helically laid outer layer
containing six smaller wires alternated between six wires of the
same diameter as the wires in the layer underneath. Both layers
have a common length and direction of lay (see Fig. 1).
1.2 For the purpose of this specification, normal conductor classification (Class AA, A, B, C) is not applicable as these conductors are intended for subsequent insulation. The descriptive term combination unilay-stranded shall be used in place of conductor classification. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.3.1 For conductor sizes designated by AWG or kcmil, the requirements in SI units have been numerically converted from corresponding values, stated or derived, in inch-pound units. 1.3.2 For conductor sizes designated by SI units only, the requirements are stated or derived in SI units. 1.3.3 For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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| 2. Referenced Documents | ||||||||||||||||||
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