What are the cradle rejection (cell keying) kits for NT/NW circuit breakers?
Masterpact NT and NW
Cell keying kits are standard, however the field installable kits are S33767 for NT, NWCELLKEY for NW.
NW cell keying history:
Cell Keying Kit for W/Y-frame (pins of varying lengths) All production after December 2012: NWCELLKEY
Older part numbers:
S48562C was developed to provide complete mismatch protection. It is used on breakers and boards assembled in Columbia. This has been replaced with NWCELLKEY.
The S48562 kit has pins all the same length and is from France. It has gaps in protection against mismatch. It was sold to OEMs.