STERLING TELEPHONE AND ELECTRIC Co. Ltd

Watertight Cordless Mining Switchboard in Cast-iron Case. Arranged for Double Lines. The Indicator drops are fitted with Local Contacts and Mechanical Replacement. A revolving Commutator Selector Switch is provided for each Line. A Leading-in Gland is provided for cables.

Supplied in 5, 10, 15 & 20 ways with 3 through positions.

When ordering it is necessary to state whether required for Battery or Magneto.

NOTE: Line Indicators are used for Ring Off signal.

This Switchboard complies with the requirements or the Coal Mines' Act.

No. U 572a

Gas and Watertight Indicator only, style similar to above but without Switches in a Cast-iron Case. Fitted with Mechanical Replacement Movements. Two Terminals are provided for each Movement. One leading in gland.

Supplied in 5, 10, 15 & 20 ways.

Last revised: April 28, 2021