The items themselves may be {TAIL ~ a source} of {HEAD ~ EMI} adversely affecting other electrical current carriers, in which case it is desirable to isolate them 
The items themselves may be { TAIL ~ a source } of { HEAD ~ EMI } adversely affecting other electrical current carriers , in which case it is desirable to isolate them
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH