There are 3 Surewire pre-wired maintenance free light and switch junction boxes available SW4L-MF and SW2L-MF.

Each model has 2 power in/out connections and a number of independent light and switch connections.

SW4L-MF & SW2L-MF are 4 & 2way pre-wired light and switch junction boxes respectively.

SW2L-MF has been designed for the addition of extra lighting including extensions, conservatories, garages, lofts and outdoor lighting etc.

Main Benefits

  • Easy to wire and maintain
  • Less complicated saving time and effort
  • Reduces the number of terminal connections
  • All connections are cut and stripped to the same length
  • Modular and integrates into any system
  • All cables are strain relieved
  • Can be used in domestic, commercial and industrial premises
  • Rated to 16A 250V
  • Approved to BS EN 60670-22

Other Benefits

  • Surewire is very simple to wire with the circuit pre-determined and clearly marked on the box.
  • Each wire has its own terminal connection which is best practice.
  • Any maintenance or adding additional light switches and light connections is very simple.
  • The lids have recessed areas where stickers or tape can be fixed to identify the light location.
  • Screws in the lid are retainable so you don’t lose them when the lid is removed.
  • The box has cut out tabs so no connection is left open if it’s not being used.
  • Securing holes in the box base are spaced so it can be secured easily to a standard 3” beam.
  • If a light connection is no longer required, simply remove the connection.  No rewiring required.
Model Description Connections Rated Sizes
SW4L-MF 4way Pre-wired Maintenance Free Light and Switch Junction Box 2 power in/out connections and 4 independent light and switch connections
16A L191 x W135 x D22mm
SW2L-MF 2way Pre-wired Maintenance Free Light and Switch Junction Box 2 power in/out connections and 2 independent light and switch connections 16A L137 x W135 x D22mm
Surewire
Lid annotations
P I/O = Power in/out connection
S1, S2... = Switch 1 connection, Switch 2 connection...
L1, L2... = Light 1 connection, Light 2 connection...
Inner box annotations
P I/O = Power in/out connections
S1, S2... = Switch 1 connection, Switch 2 connection...
L1, L2... = Light 1 connection, Light 2 connection...
L = Live connection
E = Earth connection
N = Neutral connection
Loop = Switched Live to Light Live connection
Terminal Specification
Cut and remove breakouts on base as required
Press terminal to insert or remove conductor
Conductor size 0.5mm² to 1.5mm² solid or stranded
Cable strip length 10mm
Maximum number of conductors per unit:
SW6L-MF=42, SW4L-MF=30, SW2L-MF=18
Maximum 1 conductor per terminal
Test point located on top of each terminal

How to install

One cable goes from the consumer unit to the junction box P I/O connection, one cable goes from the junction box S connection to the switch and one cable goes from the junction box corresponding L connection to the light.  If extra light and switch connections are required, another Surewire junction box can be added in series by using the spare P I/O connection.

To integrate Surewire into current systems, isolate the power, locate the lighting radial power cable, cut the cable and wire to both ends of the Surewire junction box at the P I/O connections.  This reinstates the radial power and gives you extra light and switch connections.

sw4l-mf