NBS Source
Fire and Acoustic Socket Boxes


Suitable for both new installations and refurbishments, available for both single, double and twin-gang applications.


Socket box insert designed to help maintain the fire resistance and acoustic integrity of walls.

Features and benefits:

  • Fabricated from Class O foam to ensure compliance with relevant fire regulations.
  • Cost effective, very quick and easy to install.
  • Durable, prefabricated, robust construction.
  • Suitable for both plastic and metal socket boxes.
  • Easy to install putty pad alternative.
  • Acoustic tested to BS EN ISO 140-3:1995 and BS EN ISO 717-1:1997.

General information




Pr_25_80_81_51 Mineral wool fire-stoppingPrimary


P12/310 Boards

Product range

Acoustic Ancillaries

Specification data - Mineral wool fire-stopping Enhanced data

Fire performance

To BS EN 1366-1 and BS EN 13664-2: 120 minutes.

Product Reference

Fire and Acoustic Socket Boxes - Single

Fire and Acoustic Socket Boxes - Double

Socket box depth:

35 mm.

47 mm.


BS EN ISO 140-3:1995.

BS EN ISO 717-1:1997.


To BS EN 1026:2000: Tested over a pressure range of 2–50 Pa.

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