Metal Meter Isolation - 2 Way Double Terminal Main Switch - MEC2100

The MEC2100 is a compact 2-module metal meter isolator with a 100A Double Pole Main Switch and twin screw terminals for secure tail clamping. Installed between the electricity meter and consumer unit, it provides clear, safe isolation - now increasingly required by DNOs and supply authorities as part of standard installation practice.

Where it’s used: new domestic installs, rewires, and distribution upgrades. The MEC2100 makes future maintenance or meter swaps straightforward by providing a dedicated point of disconnection. Its robust metal enclosure, colour-coded handle, and sealable screw lid give installers and inspectors confidence on compliance and ease of use.

For outdoor meter boxes, pair with an IP65-rated enclosure and a tails gland for compliant cable entry. Often installed alongside 100A terminal blocks and metal consumer unit enclosures as part of a full upgrade.

• 100A rated main switch – 2 pole with twin screw terminals
• Compact design – 2 module metal enclosure
• Secure tail termination – supports 16mm² and 25mm² meter tails
• Colour-coded handle – fast visual identification
• Dimensions: 74mm (W) × 175mm (H) × 90mm (D)

Now a standard part of the contractor’s toolkit, especially in meter-box-ready installs. Fully compliant to BS EN 61439-3 and ready for residential and light commercial sites.

The MEC2100 is installed between the meter and consumer unit to allow safe disconnection for maintenance or upgrades. Installation must be carried out by a qualified electrician, and is recommended by many DNOs and housing developers as best practice.

• Supports 16mm² and 25mm² meter tails
• Mount vertically in an approved meter housing or enclosure
• Use correct torque settings on screw terminals
• Seal lid after installation if required by supply authority

What is a meter isolator used for?

A meter isolator provides a safe disconnection point between the electricity meter and the consumer unit. This allows electricians to carry out rewires, board changes, or meter swaps without relying on the DNO to disconnect the supply.

Do DNOs require a meter isolator?

Yes - many DNOs and supply authorities now recommend or require a meter isolator to be fitted during new connections, upgrades, or rewires. It is becoming standard practice across the UK.

Can this isolator handle both 16mm² and 25mm² tails?

Yes. The twin screw terminals are designed to securely clamp both 16mm² and 25mm² tails, ensuring a safe and compliant connection.

Can I install this in an outdoor meter box?

Yes, but the unit itself is not weatherproof. For outdoor installations, it should be fitted inside an IP65-rated enclosure with a tails gland for compliant cable entry.

Is this isolator lockable?

Yes. The lid is sealable with screws and can also be padlocked if required, providing tamper protection.

Is the MEC2100 compliant with UK wiring regulations?

Yes. The unit is fully compliant with BS EN 61439-3 and is approved for use in residential and light commercial installations.