Indicates current rating of this breaker.
0=Breaker is not present.
1=Earth leakage connection.
2=Neutral connection.
A value greater than 2 indicates breaker current rating in Amps.
A value above 60 Amp will signify a remote feed.
The xPDUBranchBreakerRDPFeed OID will indicate which breakers are
configured as a remote drop.
Note: When setting branch circuit thresholds/ratings for an entry,
all positions tied (see the xPDUBranchBreakerTieIndicator OID)
to this entry will inherit the new threshold/rating.