Aluminium feed JS4 series meter socket. Permanent red nameplate affixed to front cover warns that removal of meter does not isolate the load terminals also notice of automatic circuit closing. Device on JS4A and warning to short circuit current transformer secondary before removal of meter on JS4B. Meter socket configuration for 4 jaw meters. 400/4 A three-wire current transformer provides low current for service metering proportional to higher current draw. Consumer and corporate affairs. Gutter wiring space provided on left side.