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§ 25.1715
Electrical bonding and protection against static electricity: EWIS.
(a) EWIS components used for electrical bonding and protection against static electricity must meet the requirements of § 25.899.
(b) On airplanes having grounded electrical systems, electrical bonding provided by EWIS components must provide an electrical return path capable of carrying both normal and fault currents without creating a shock hazard or damage to the EWIS components, other airplane system components, or airplane structure.