The load source line 138 is connected to {HEAD ~ the source side} of a load 150 and {TAIL ~ the load neutral line} 148 is connected to the neutral side of load 150 to complete a distribution circuit  
The load source line 138 is connected to { HEAD ~ the source side } of a load 150 and { TAIL ~ the load neutral line } 148 is connected to the neutral side of load 150 to complete a distribution circuit
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH