Spec-55 wire is
insulated with modified radiation cross-linked ETFE polymer. The dual wall airframe construction is currently implemented on numerous aircraft programs. Choices of wall thickness include .25 [.010] (55A08XX 10 mil) and 0.2 [.008] (55A02XX 8 mil). Spec-55 includes a contrasting core color acting as a damage indicator. Balancing properties make this wire ideal for resistance to chemical and solvents, and impeccable electrical arc rack resistance.
Available in single or dual wall constructions, the Spec 55 wire is small in size, lighter weight, and resistant to electrical arc tracking in wet or dry conditions. The
55PC portion of this spec is unique as it adheres to the Boeing material standard BMS13-48 spec.