Tests After the helical retractile cord has been designed and constructed, the tests are basic for normal usage. The basic tests are given in the paragraphs that follow. (Other tests may be employed for special cables or special usage).
1.	Extension Qualities A specified cable length must extend to a specified distance, at a specified temperature, under a specified load, and remain for a specified time period. After this time period has expired and the load is removed, the cable coil must retract to its original length or a specified percentage thereof.
2.	Retractile Qualities (Low-temperature) The completed electrical cord is placed in a cold chamber at a specified temperature, in a horizontal position, for a specified length of time. At the conclusion of the time period the cord is extended a specified distance and rate while at this temperature. No fracture of the jacket, conductor insulation, or conductors should occur. While still at this reduced temperature, the cord is released, and within a specified time it must retract to within a certain percentage of the original retracted position.
3.	Low-temperature Impact Resistance After a specified time at a specified temperature ("cold soak"), and while in the cold chamber, a specified weight is dropped a given distance on the retractile-cord helix. The jacket and insulation are them examined for cracks or other defects.
4.	Extension-Retraction Life At a specific temperature the cord is extended to its usable extended length and allowed to retract. This action, in this sequence, constitutes one cycle. Rate of extension and retraction per cycle is specified. Upon completion of the specified number of cycles, continuity and/or resistance is measured. Failure will be determined as loss of continuity or specified increase in conductor resistance.