



MK Sentry Y8664SMET 18th Edition All Metal 12 Way (6 Useable Ways ) Pre-Populated Twin RCD Flexible Consumer Unit With 100A Switch Disconnector Isolator & 2 x 100A 30mA Type A RCDs
Y8664SMET
MK Sentry Y8664SMET All Metal 12 Way Twin RCD Consumer Unit – Pre-Populated, 100A Main Switch, 2 x 100A Type A RCDs, 18th Edition Compliant
The MK Sentry Y8664SMET is a high-integrity, 18th Edition-compliant 12-way all-metal consumer unit with 6 useable outgoing ways. Designed to meet the latest wiring regulations (BS EN 61439-3), it includes a 100A main switch disconnector, two 100A 30mA Type A RCDs, and 6 MCBs (2 x 6A, 1 x 16A, 2 x 32A, 1 x 40A). Its twin RCD split-load configuration offers full flexibility and supports future expansion or RCBO upgrades as needed for non-RCD protected circuits.
- Fully Pre-Populated: Includes a 100A DP main switch, 2 x 100A 30mA Type A RCDs, and 6 MCBs for immediate, regulation-compliant installation.
- 6 Useable Ways: Offers a practical solution for smaller installations while maintaining flexibility with 12 total module spaces.
- Twin RCD Configuration: Enables grouping of circuits for improved safety and fault isolation, with repositionable RCDs to suit site requirements.
- 18th Edition Ready: Designed in accordance with BS EN 61439-3 and IP2XC protection standard to support safe and compliant installations.
- Robust All-Metal Enclosure: Manufactured from Zintec steel with modern MK white finish, top-hinged door, offset incomer, and removable DIN rail for streamlined installation.
Supplied Components
- Main Switch: 1 x 100A Double Pole Isolator
- RCDs: 2 x 100A 30mA Type A
- MCBs: 2 x 6A, 1 x 16A, 2 x 32A, 1 x 40A
- Useable Ways: 6 out of 12 available module slots
Technical Specification
- Material: Zintec Steel (Non-combustible)
- Dimensions: W: 310mm x H: 244mm x D: 116mm
- Ingress Protection: IP2XC (BS EN 60529)
- Standard Compliance: BS EN 61439-3
✅ Choose the MK Sentry Y8664SMET for a compact, 18th Edition-compliant consumer unit offering dual RCD protection and flexible installation in residential and small commercial settings!

Body Finish | Zintec |
Rcd 2 Rating | 100 A |
Rated Voltage | 230 V |
Surge Protection Included | No |
Range | Circpro MK Sentry |
Installation Type | Domestic |
Sensitivity | 30 mA |
Product | Consumer Unit - Pre Populated |
Ingress Protection | IP2XC |
Voltage | 230|240 V |
Pole Configuration | Double Pole (2P) |
Mounting | Surface |
Width | 310 mm |
Depth | 116 mm |
Current Rating | 100A |
Standards | BS EN 60529 BS EN 61439-3 |
High Integrity | No |
Rcd Rating | 100 A |
Rcd Sensitivity | 30 mA |
Number Of Poles | Double Pole (2P) |
Height | 244 mm |
Door/lid Type | Solid |
Rcd 2 Sensitivity | 30 mA |
Body Colour | White |
Number Of Phases | Single |
Body Material | Steel |
Current Rating (max) | 100 A |
Outgoing Ways | 12 Way |
Incomer Included | Y |
Incomer Type | Switch Disconnector/RCD |
Incomer Current Rating | 100 A |
Metered | N |
Split Load | Y |
Rcd S Included | Y |
Number Of Rcd S | 2 |
Outgoing Devices Included | Y |
18th Edition Compliant | Y |
Delivery Options:
- PRIORITY DELIVERY – Next Working Day (All items in stock and ordered before 3 pm) - £7.08 inc-VAT. (£5.90 ex-VAT)
- Orders Over £100 (before VAT): We offer free standard shipping on all orders shipped to UK mainland addresses
- Orders under £100 (before VAT): Our standard delivery fee to UK mainland addresses is £5.90 ex-VAT (£7.08 inc-VAT)
*Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £12 ex-VAT for all orders (Prices subject to change).
Items requiring specialist shipping:
- Orders containing Solar Panels, Batteries and/or Inverters: Up to 50 qty will be dispatched on a pallet and incur a £120 ex-VAT delivery charge**.
**Delivery charges to JE, GY, TR, BT, IM, IV, HS, KW, ZE and certain PA post codes are £180 ex-VAT (Prices subject to change).
Contact us if you have any further questions.