A CD 280 (or its porcelain equivalent) was commonly used to physically connect and electrically insulate series street lighting fixtures from the rest of their mounting brackets. This was accomplished via a metal clamp that went around the insulator's wire groove affixed to the end of the bracket's pipe and standard pin threading that was part of the fixture's top. Sometimes dangerous high voltages were incurred via series street lighting circuits and electrical isolation was important for safety and circuit continutity.

In addition we see some telephone openwire supplemented by paired cable with "bridle" style rings supporting it via its messenger wire through this town's centre.