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UNDERWRITERS LABORATORIES
i -- INC. TESTING FOR PUBLIC SAFETY
GENERAL INFORMATION FROM
ELECTRICAL CONSTRUCTION
f^
MATERIALS AND HAZARDOUS LOCATION EQUIPMENT DIRECTORIES
May 1979
GENERAL INFORMATION FROM
68 ELECTRICAL CONSTRUCTION MATERIALS DIRECTORY
The Listing Mark of Underwrite** Laboratories loo. on the product to the only method provided by UL to identify product* manufactured under it* Listing end Follow-Up Service. The Listing Mark for these products includes the name and/or symbol of Underwriter* Laboratories Inc. (as illustrated in the Introduction of this Directory! together with the word "Listed", a control number, and tbe following product name: "Nonmetaliic Flexible Tubing".
UNDERGROUND FEEDER AND BRANCH CIRCUIT CABLE (YDUX)
Underground feeder and branch-circuit cable is rated for use at 60* C. 600 volte andto
Listed in sues Noe. Id to 4/0 AWG inch, copper, and Noe. 12 to 4/0 AV.G mel., alumi
num or copper-clad aluminum, for single and multiple conductor cable*. It to designated
as Type UF cable and is intended for use in accordance with Article 339 of the National
Electrical Code.
. ., . ,, .
Submersible Water Pump Cable--Indicates a multi-conductor cable in which 2. 3. or
4 single-conductor Type UF cables are twisted together without an outer wm|. The cable is Listed in size from H AWG to 2 AWG inch, copper, and from 1. AWG to 2 AWG inch, aluminum or eopper-elad aluminum. The cable is tag marked For use within
the well easing for wiring deep-well water pumps where the eahle is not subject to repetitive handling caused by frequent servicing of the pump units." The insulation may
also be surface-marked "Pump Cable." tvi. cable may employ copper, or aluminum, or copper-clad aluminum conductors.
Cables with eopper^lad aluminum conductors are surface printed "AL iCU-CLAD) or "Cu-Clad Al." Cables with aluminum conductors are surface printed **AL.'
For termination information, see Guide AALZ information.
.
Cables suitable for exposure to direct rays of tbe sun are indicated by Us marking
and marking on the surface of the cable with the designation "Sunlight Resistant.
This cable may be terminated by using nonmetaliic sheathed cable connectors (See Nonmetaliic Sheathed Cable Connector*).
If single conductor Type UF eahle is terminated with a fitting not specifically recog nised for use with single conductor cable, special care should be taken to assure it is
properly secured and not subject to damage.
The Listing Mark of Underwriters Labor*tone* Inc. on tbe product to the only method provided by UL to identify products manufactured under its Listing and Follow-Up Ser
vice. The Listing Mark for these produets includes the name and/or symbol of Under writers Laboratories Inc. (as illustrated in the Introduction of this Directory) together
with tbe word "Listed", a control number, and a product-name. An underground feeder
cable that contains copper or eopper-elad aluminum conductor has the product name. "Un derground Feeder Cable": an underground feeder cable that contains aluminum conductor
has the product name. "Aluminum Underground Feeder Cable".
UNIT SUBSTATIONS (YEFR)
This listing covers unit substations intended to be installed in accordance with the requirements of the National Electrical Code and in accordance with the installation
instructions provided on the unit substation. A -unit substation consists of a transformer in combination with primary and/or
secondary overcurrent protective devices .or switching, devices housed in a single enclosure.
Some unit substations are suitable for use as service equipment and are so marked. Such marking is part of the listing mark as noted below, or is an integral part of other required markings.
Listed unit substations are for use with copper conductors unless marked to indicate which terminals are suitable for use with aluminum conductors. Such marking shall be independent of any marking on terminal connectors and shall be on a wiring diagram or other readily visible location. If all terminals are suitable for use with aluminum conductors, the marking will indicate "Use copper or aluminum wire." A unit substation
employing terminals for main or branch circuit units individually Marked Cu-Al will be marked "Use copper-Al wire" or "Use copper wire only." The latter statement indicates that wiring space or other factor* make the unit substation unsuitable for aluminum conductors.
Unless the unit suhstation is marked with both the size and temperature rating of wire to be used, the termination provisions are based on the use of 60 C ampacities for wire sizes Nos. 14-1 Awg and 75 C ampacities for wire Nos. 1/0 Awg and larger.
Unit substations have the secondary neutral bonded to the enclosure and have provision on the neutral for connection of a grounding conductor. A terminal is also provided
on the enclosure near the line terminals for use with an equipment grounding conductor between the unit substation and the enclosure of equipment on the line side of the unit
substation for use when a metallic conduit system is not provided. Unit substations are marked for outdoor use or for indoor use.
The suitability of unit substations for use on high capacity cireuits has not been investigated.
The Listing Mark of Underwriters Laboratories Inc. on the product is the only method pro vided by UL to identify products manufactured under its Listing and Follow-Up Service. The Listing Mark for these products includes the name and/or symbol of Underwriters Laboratories Inc. las illustrated in the Introduction of this Directory) together with the
word "Listed", a control number, and the following product name: "Unit Substation".
WIRES (ZGZX)
Insulated wire is intended for installation and use in accordance with the National Electrical Code. Unless indicated in the individual General Information sections under the various Wire Classifications, conductor sizes range from Nos. 14 Awg to 2000 MCM inclusive.
-+ LOOK FOR THE LISTING MARK
Asbestos*Ir Type A-
Awg inctutm Type A A
Sixes No. l< Type Ai
through No. Type Al
volts Diinm The Lisrirt
the sms) lest symbol on p manufacturer product* inei in the Introc and the folio
Asbestoe-varr Type AVA --
impreens Type AV|t--
and impr No 12 / Type AVL-- asbestos. Wires for u type letu
All manufac certain n
Type AVU Wires with i Wires with a
The ampac conductors. ' recognized foexcept that 1 binding screw are recognise* able for inte connections o intermixed cc
The Listing the smallest UL symbol or manufactured products tnel illustrated In a control nuc
Fixture wire Flexible Cord t
All conductt 90 C may emi
Thermopiast care should b>
Gasoline res sidered inhere: of the wire ty
Gasoline res of extruded n> vapor* at ordi on the inxulat Oil Resistant Gasoline and at 75 C.
Wires which Type FXT i. are marked "V may use the "
Fixture wire 60 C max: Tbermor 6t>0 v, Christine 125 v. The
inaulatinn on
GENERAL INFORMATION FROM ELECTRICAL CONSTRUCTION MATERIALS DIRECTORY
69
ASBESTOS-INSULATED (ZHNV)
AabestM-lnsalated wires ir classified and rated aa follow*:
Typo A--with asbestos insulation. 300 volts maximum. Sites No. 14 through No. 3
Awg inclusive. copper. Type AA--witb an asbestos or glass braid and asbestos insulation. 300 volts maximum.
Sixes No- 14 through No. 4/0 Awg inclusive, copper. Type Al--with impregnated asbestos insulation. 300 volts maximum. Sixes No. 14
through No. 8 Awg inclusive, copper.
Type AIA--with an asbestos or glass braid and impregnated asbestos insulation. 300 volts maximum. Sixes No. 14 Awg through 1000MCM inclusive, copper.
The Listing Mark of Underwriter* Laboratories Inc. on the attached tag. the reel, or
the smallest unit container in which the produet is packaged with or without the UL symtiol on the product is the only method provided by UL to identify these produets manufactured under its Listing and Follow-Up Service. The Listing Mark for there products includes the name and/or symbol of Underwriters Laboratories Inc. iss illustrated in the Introduction of this Directory) together witb the word "Listed", a control number, and the following product name: "Asbestos-Insulated Wire".
ASBESTOS-VARNISHED-CLOTH (ZIBT)
AsbMto*-varnihed-cloth wires are classified as follows:
Typ AVA--an asbestos or glass braid, and insulation consisting of varnished cloth and
impregnated asbestos. Sizes No. 14 Aw; through 2000MCM inclusive, copper.
Type AVI)--a flame-retardant cotton braid. a:id insulation consisting of varnished cloth
and impregnated asbestos. Sizes No. 18 Awg through 2000MCM inclusive, copper, and
No 12 Awg through 1000MCM inclusive, aluminum or copperclad aluminum.
Type AVLr--a lead covering, and insulation consisting of varnished cloth and impregnated
asbestos. Sizes No. 14 Awg through 2000MCM inclusive, eopper.
Wires for use at voltages above 600 are indicated by adding numerical suffixes to the
type letters, as follows:
Numerical
Maximum Working
Designation
Voltage
10 1000
20 2000
30 3000
40 4000
60 6000
All manufacturers are listed for 600-volt wires. As stated in the individual listings,
certain manufacturers are also listed for wires with voltage rating up to 6000 volta.
Type AVB wire may employ copper, or aluminum, or copper-clad aluminum conductors. Wires with copper-clad aluminum conductors are surface printed "AL (CU-CLAD)." Wires with aluminum conductors shall he surface printed "AL."
The ampacity of copper-clad aluminum conductors is the same as for aluminum
conductors. The wire connectors used with copper-clad aluminum conductors shall be recognized for use with copper and aluminum conductors and shall be marked "AL-CU."
except that 12-10 Awg solid copper-clad aluminum conductors may be used with wire binding screws and in pressure-plate and push-in spring-type connecting mechanisms that
are recognised for use with copper conductors. Copper-clad aluminum conductors are suit able for intermixing witb copper or aluminum conductors in terminals for splicing
connections only when the wire connectors are specifically recognized for sueh use. Such intermixed connections are limited to use in dry locations.
The Listing Mark of Underwriters Laboratories Inc. on the attached tag, the reel, or
the smallest unit container in which the product is packaged with or without the TIL symbol on the product is the only method provided by UL to identify these products
manufactured under its Listing and Follow-Up Service. The Listing Mark for these products includes the name and/or symbol of Underwriters laboratories Inc. (as
illustrated in the Introduction of this Directory) together with the word "Listed", a control number, snd the following product nine: "Asbeatoe-Varnished Cloth Wire".
FIXTURE WIRE (ZIPR)
Fixture wires are rated 600 volts, or less, as shown, and comply with the Standard for Flexible Cord and Fixture Wire of Underwriters Laboratories Inc. (UL62).
All conductors are copper except fixture wire having a temperature rating higher than
90 C may employ nickel.
,
Thermoplastic compounds may stiffen at temperatures below minus 10 C (14 F) and care should be used in handling at such temperatures.
Gasoline resistant wire bas been tested at 30 C when immersed in gasoline It is con sidered inherently resistant to gasoline vapors within the limits of the temperature rating of tb* wire tyjie.
Gasoline resistant TFN or TFFN--Indicates a TFN and TFFM conductor with a jacket of -xtruded nylon suitable for exposure-to mineral oil. and to liquid gasoline and gasoline vapors at ordinary ambient temperature. It is identified by tag marking and by printing on the insulation or nylon jacket with the designation 'Type TFN (TFFN i Gasoline and Oil Resistant I" if siti'ahle for exposure to mineral oil at 60 C or "Type TFN (TFFN)
Gasoline and Oil Resistant II" if the compound is suitable for exposure to mineral oil &t 75 C.
Wires which comply with a special vertical flame test are marked "FR-1" or "VW-1 * Type FXT in sizes 20 and 18 AWG which comply with an artificial weathering test
are maiked W-A. Type FXT m sizes 24-22 shall comply with the weathering test and may use the "W-A" marking.
Fixture wires are classified as follows: 60 C maximum operating temperature.
Tb-monlastic-insuiated wires. 600 v. 18-16 AWG sixes: Type* TF. TFF.
Christmas-tree wires.
125 v. 24-18 AWG size: Type FXT*.
The maximum voltage is 300, provided that the nominal thickness of the insulation on the conductor is 2/64 in.
LOOK FOR THE LISTING MARK <--<