Low Voltage IR Test Result

[Orlyboy]

Dear All,
Seeking your opinion on the below Insulation Resistance Test result for the Low Voltage cables.
Each Motor supply cables has 2runs of 3C x 120mm² with approximate distance of 120meters.

CONCERNS:
1. Based on the IR results, are the cable acceptable to be Re-Used?
2. For motor C, what could be the reasons why it has less reading compare to other 3 motors?

Motor	Volt/Phase/Cycle	Phase A to Phase B	Phase A to Phase C	Phase B to Phase C	Phase A to Ground	Phase B to Ground	Phase C to Ground
A	460V/3/60Hz	38.6 GΩ	36.8 GΩ	44.3 GΩ	22.4 GΩ	22.7 GΩ	23.9 GΩ
B	460V/3/60Hz	38.1 GΩ	42.2 GΩ	38.4 GΩ	22.3 GΩ	23.1 GΩ	22.8 GΩ
C	460V/3/60Hz	9.9 GΩ	13.7 GΩ	10.88 GΩ	6.23 GΩ	5.9 GΩ	8.81 GΩ
D	460V/3/60Hz	35.5 GΩ	40.5 GΩ	43.6 GΩ	21.2 GΩ	21.4 GΩ	22.9 GΩ

Thank you in advance