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