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STANAG 4007
STANAG 4007 electrical connectors between prime movers, trailers and towed artillery
Makers of military prime movers, trailers and towed artillery, and of the connector and cable assemblies fitted between them, and the buyers who specify those fittings.
STANAG 4007 is the NATO agreement on the 12-pole, 24V electrical connectors between military towing vehicles and their trailers or towed artillery. NATO has not released it publicly; this page describes it from the Czech defence standard that implements it.
- Edition
- 3
- Published
- 2021-10-15
NATO has not released this STANAG publicly. It is NATO UNCLASSIFIED, and organisations that need it obtain it through their national standardization authority.
What it is
STANAG 4007 is the NATO Standardization Agreement on electrical connectors between prime movers, trailers and towed artillery. Edition 3, promulgated 15 October 2021 under NATO's CNAD, AC/225 NAAG, LCGLE, covers AEP-4007, edition A.
NATO has not released STANAG 4007 publicly, so this page describes it from the Czech defence standard that implements it, ČOS 254002. The Czech national standards index describes ČOS 254002 (3rd edition, 2023) as setting the dimensions of the 12-pole, 24V sockets and plugs used to connect military towing vehicles to trailers of the combat, security and special-vehicle categories, and the location and circuit arrangement of those sockets. A national implementation can add national requirements and reservations, so what follows is the Czech implementation's content, not NATO's own text.
What the Czech implementation requires of the connectors
ČOS 254002 introduces the 12-pole, 24V plug and socket, in panel-mount and cable-mount form, and a range of connecting cable assemblies fitted with these connectors, for towing vehicles and trailers (including semi-trailers), towed vehicles, and other specialised military equipment. The panel socket sits at the rear of the towing vehicle, between the towing hitch and its left side, within 500 mm of the hitch; the panel plug sits at the front of the towed vehicle. On a semi-trailer tractor the socket sits between the brake air-hose couplings, and a tractor that also tows trailers needs a second, supplementary socket. Where no trailer is connected, the sockets and plugs take a protective cap, and the standard notes that a cap needs a good rubber seal at the socket face so its watertightness does not depend on the thread alone.
The connecting cable assembly comes in two types: double-ended, one cable-mount plug and one cable-mount socket joined by a 12-core cable, and single-ended, one cable-mount plug with a 12-core cable. Preferred nominal overall lengths for a double-ended assembly are 1,000 mm, 1,500 mm, 2,000 mm and 2,500 mm. Trailers and towed vehicles (other than semi-trailers) carry a cable assembly as standard equipment, at least 500 mm longer than the towbar; semi-trailers and towing vehicles carry none, except that a recovery and towing vehicle must carry a double-ended assembly.
How the circuits are assigned
ČOS 254002 assigns each of the twelve contacts to a function: A to trailer blackout and front/rear marker-light blackout; B to the left turn signal; C to the convoy light; D to ground; E to tail lights, side marker lights, front and rear supplementary marker lights and the rear number-plate light; F to the tactical brake light; H to the rear fog light; J to the right turn signal; K to auxiliary electrical power for the towed vehicle where needed; L to ground; M to the brake light; N to the reverse light. A connection using fewer wires than the standard provides for must still wire the circuits it does use to this same assignment.
On the electrical requirements, ČOS 254002 states that each contact is rated for a nominal current of 15 A, and that a socket must allow connection of the trailer's total electrical load up to a nominal 30 A. The panel plugs and sockets must be earthed to each nation's own requirements, and although the connectors are intended primarily for 24V vehicles, they may be used on other voltages provided a plate stating the voltage and polarity is fitted near the connectors.
How we help
A supplier bound by STANAG 4007 through a contract holds the obtained text through its national authority. In ComplyTrain you record the requirements that apply to you as your own requirements, give each an owner, and keep the evidence that shows you meet them against each one.
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