J-w-1177/26A
September 27, 1976
5WES5EDING
J-w-001177/26 (NAVT-Ships)
September 21, 1973
FEDERAL SPECIF1CATION SHEET
I
WIRE, MAGNET, ELECTRICAL, CLASS 180, TYPE DgH,
POLYESTER-GLASS -FIBER-COVERED , RECTANGULAR
This speci ficati.m was approved by the C.anur,issitnm?r, Federal supply Service, General
Services Admini.9tr.stion, for use of all Federal agencies.
The complete requireu,enta for procurirq the wire described herein shall consist of
this document and the latest issue of Specification J-w-1177 /GEN.
The magnet wire shall
be of the followimg classification:
‘Type Dg2H - Sare with double polyester-glass, silicoms varnished
Type LDg2H and type L2Dg2H - Single or heavy film, double polyester-glass-fiber,
silicone varnished.
Rectangular.
REQUIREMSNTS :
1.
2.
3.
4.
5.
Qualification is required.
Insulating materials.
The fiber covering shall cc.nsiBt of a cotiinaticm of poly-
ester and glass fiber B.
The glass fiber shall be co”ti””c.w!- filarncmt glass yarn
Conforming to M2L-Y-1140.
The polyester fiber shall be a high-grade yarn resulting
from the linear polymerization of ethylene glycol and terephthalic acid. The
maximum co.tent by weight of the polyester fiber i“ the yarn shall not exceed 50
percent.
Thermal evaluation.
When the wire has an Ur,derlyi”g film, the film coated wire
shall meet the requirements of the applicable sp.acificatio” sheet for class 155
requirements before it is covered with fiber.
The varnish used in treating fibrous
covered wire shall conform to the req”ireu,ents of class 180 of MIL-1-24092, or a“
alternate selected on the basis of service experience or equival.at test data.
The varnish used shall be identified i“ the qualification test report (see 6.3
of basic specification) .
A~lication of
wlyester-glasa- fiber.
The polyester-glass-fiber covering shall be
wrapped firmly, closely, evenly and continuously around the wire.
tie” more than
one layer of polyester-glass-fiber is applied, adjacent layers shall be wound i.
opposite directions.
The polyester-glass-fiber covering shall be fused a“d treated
with a modified silicone insulating varnish or silicone compound to provide a tough
outer finish.
Dimensions.
~;;.l%%%+%”dinwnsio”s.
The sizes and radii shall be as shown i“ table 1.
The tolerances shall be as shown i“ table 11.
5.1.2 Increase in thickness.
When measured i“ accordance with 4.7.1.2.5, the
increase in thickness due to double polyester-glass fiber covering shall
be as shown i“ table 111 and the increase dw? to polyester-glass fiber
and heavy film shall be as shown i“ table Iv (single fiber covering) and
table V (double fiber covering) .
5.1.3 I“Crease i“ width.
Nhen measured i“ accord?.”ce with 4.7.1.2.5, the i“creaae
in width dw to the polyester-glass-fiber covering shall be equal to or
less than the increaee in thickms.ss.
5.2 w.
The conductor size and radii shall be i“ accordance with table VI.
When measured in accordance with 4.7.1.2.5 the minimum increase and maximum
overall dimensions due to the polyester glass-fiber covering over bare or
hea~-filrm-coated Bquare wire shall be as shown i“ table VI.
FSC 6145
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