2.8 Coaxes
A coax is supplied with each 406 ELT with BNC fittings. They are pre-made and are (6) six feet
in length. This is considered to be the optimum length. Excess should be stored as prescribed in
AC43.13-1B/2A. If you require longer coaxes please contact the manufacturer.
2.9 Minimum Wiring Requirements
406ELTs are manufactured for both certified and non-certified aircraft. It is important to note
that there are many types of wires that are used in aircraft today. Some are airworthy and some
are not.
Generally no PVC wiring or off-the-shelf phone cords meet the requirements found in AC43.13-
1B/2A. They must be strong enough and have the durability to withstand normal operations. A
minimum of 19 strands is required and to be made of a material that does not produce excessive
line loss and be on the Qualified Products List.
Emerging Lifesaving Technologies requires the wires meet the current FAA requirements. We
require that the wire be Mil Spec 22759/24, MIL-W-16878, M27500 or their commercial
equivalent. Either 24 or 22ga is acceptable. An 8-conductor bundled wire of Mil Spec
22759/18-24 is also acceptable.
Pre-made harnesses are available in various lengths. Contact the manufacturer for more
information.
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