Table 22: Ambiguity from for four-step RC ladder network.

FaultAmbiguity with the following

short short, short (, ), short, short (), short ()
openNo ambiguity
short short (, ), short (), short (all )
short short (), open, open (), short (), open (, & ≥16), short (all )
open short, short (), short (), open (), open (all )
short short (), open (), short (all )
short short (), open (), short, short (), short, short (), open, open (), short, short ()
open short, short ( & ≥16), open, open (), short, short (), short ()
short short (), open (), short (all )
short short (), open, open (), short (), open ( & ≥16), short (all )
open short, short (), short (), open (), open (all )
short short (, ), short (), short (all )