Wiring cable inspection methods and rules

We are going to present the inspection methods and rules for cabling.

1. Test methods

1.1 Direction of the cabling

The cabling direction of a layer is recognized as a moving direction far away from the visual observer. Right is clockwise direction while left is anticlockwise. 

Or in other definition, the right direction is when the core is placed vertically, and a single line complies with the direction of the middle part of the English alphabet "Z".

The left is that when placed vertically, a single line complies with the direction of the middle part of the English alphabet “S'

1.2 Core arrangement observations are normally conducted

1.3 Cabling pitch is measured with a micrometer or steel ruler

1.4 Calculation of roundness

The average dia of a power cable is measured with paper tests, and the maximum, and minimum diameters are measured by a vernier caliper at the same cross-section vertical to the section. 

The difference between the maximum and minimum diameter difference divided by the average diameter is roundness (f )

1.5 Filling

Visual check whether the material complies with technical documents in normal environments.

2. Inspection Rules

2.1 For the initial boot or replacement of the model, the first inspection must be conducted on every item.

2.2 The procedure inspection should be conducted as per table 2 with the lowest value of the specified. 

In conditions, a permit can increase the frequency of inspection.

Self-inspection Specified inspection

1 Cabling direction once/drum Once/hour and at least once for each drum

2 Core arrangements Twice/drum

3 Cabling pitch Once/drum when changing gear

4 Roundness Twice/drum, after changing the filling

5 Filling When changing the filling