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MIL-DTL-917 Electric Power Equipment, Basic Requirements ForThis specification covers the basic requirements applicable to the design, materials, and construction of naval shipboard electric power equipment \(exclusive of communication equipment, information technology \(IT\) equipment, and combat systems [fire control and weapons control equipment]\). Unless otherwise specified herein, the electric equipment developed for shipboard use under the requirements of this specification are limited to a maximum 450 volt \(V\) alternating current \(AC\) and a maximum 1,000 V direct current \(DC\). This equipment is intended for use on surface and submarine naval vessels \(see 6.2\).

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MIL-DTL-917F(SH)

TABLE XVI. Hook-up wire.

Insulation

Applicable document

Max. temperature, �F (�C)

Crosslinked, modified polyethylene

MIL-DTL-16878, /15, and /16

257 (125)

Polytetrafluoroethylene 1/

ANSI/NEMA HP 3

392 (200)

Silicone rubber 2/

ANSI/NEMA HP 6

392 (200)

Silicone rubber 2/

ANSI/NEMA HP 6

302 (150)

Fluorinated ethylene propylene 1/

ANSI/NEMA HP 4

392 (200)

Crosslinked polyalkene

SAE-AS81044/8, /9, /10, /11, /12, and

302 (150)

/13

Fluorocarbon/polyamide 1/

MIL-DTL-81381 (refer to

302 (150)

MIL-W-81381/22 for guidance only)

Crosslinked ethylene-tetrafluoroethylene 3/

SAE-AS22759/47, /48, /49, and /50

392 (200)

NOTES:

Halogen containing lead wire must be approved as specified in 3.3.6.

See 3.3.1.4 for specific prohibition on application.

Preferred due to low halogen content. Use of other halogen containing hook-up wire must be approved as

specified in 3.3.6.

3.12.1.3 Magnet wire. Magnet wire shall be selected in accordance with ANSI/NEMA MW 1000 and as

specified in table XVII.

TABLE XVII. Wire.

Wire

Limits of application

Single film (E, T, L, H, K, M)

In circuits less than 50 VA.

Multiple film (E2, T2, T3, T4, and so forth)

M2 is preferred for all applications.

Combination film and fibrous BDg and so forth

All fibrous coverings shall be furnished with film

undercoat.

Fibrous coverings GV versus Dg

Polyester fiber-glass coverings (Dg) are preferred to glass

fiber coverings (GV).

High temperature coverings MDgGM, M2DgGM, and

For 356 �F (180 �C) and higher temperature 428 �F

so forth

(220 �C) applications and where a fibrous covering is

required, the polyester fiber content shall not exceed 25%

of the total material content.

Square and rectangular

All designs shall allow rewinding by naval repair

activities using stock sizes shown in table XVIII. If wire

sizes other than those shown in table XVIII are going to

be supplied in the equipment, NAVSEA approval shall be

obtained.