So, got into an argument with a OEM that couldn’t answer his own requirement. He stated you have to temperature correct your insulation resistance readings of cables. He stated its as easy as using table 100.14.1 of NETA ATS. I mentioned that it’s not as the notes of table 100.14.1 do not allow me to temperature correct cables to 20C and the table is misleading. The note states the table is derived from Stitch in time-Megger. (see table II of following URL:)
https://megger.widen.net/s/wzw6pczpxk/a-stitch-in-time
Side Note - If you notice the table that NETA derives this from, the Table 100.14.1 column marked “Apparatus Containing Solid Insulation Other than Rotating Machinery” is actually derived from column marked “Class B Rotating Equipment”
The note for Table II-Temperature Correction Factors states 15.6 for cables with generic names for each cable insulation type. Trying to decipher these cable insulation types in manufacturer notes, the problem compounds as each manufacturer has a different temperature correction based on their insulation with Southwire/Cerrowire providing tables, Nexans and General Cable providing a calculation based on K factor of each insulation type.
