Techna jtec 10ka neutral pole fits all 10ka mcbs techna jtecn2 the techna jtec neutral pole adaptor module is a unique add on allowing the conversion of a 3 pole breaker into a 3 pole switched neutral device with one shared component so you do not need to stock 4 pole devices making inventory savings br br br when fitted the neutral pole will switch on off in conjunction with the main mcb allowing neutral isolation in conjunction with the live phases br br br the neutral pol