5 Way 100A Terminal Block – Grey
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WTB5-GY is a 5 way 100A terminal block in grey, typically used for alternate phase identification in single-phase or three-phase systems. It provides a secure, tamper-resistant solution for splitting meter tails, connecting consumer units, or managing multiple outgoing circuits in residential and commercial installs. Like the rest of the...
The WTB5-GY is a 5 way 100A terminal block in grey, typically used for alternate phase identification in single-phase or three-phase systems. It provides a secure, tamper-resistant solution for splitting meter tails, connecting consumer units, or managing multiple outgoing circuits in residential and commercial installs.
Like the rest of the WTB5 range, it accepts conductors from 2.5 mm² to 35 mm² and includes a lockable, sealable lid with blanking inserts for unused terminals. The hexagon screw design delivers strong, vibration-resistant clamping — keeping connections secure in demanding environments.
Installer Tip: Use the grey variant when wiring alternate phases in three-phase systems. This helps maintain clear colour coding and compliance with wiring standards.
Key Features
- 100A rated – suitable for heavy-duty meter tails and circuits
- 5-way configuration – simplifies multi-circuit connections
- Cable capacity: 2.5 mm² – 35 mm²
- Grey coding – commonly used for alternate phases
- Lockable, sealable lid for tamper resistance
- Blanking inserts supplied for unused ways
- Hexagon screw clamps for secure, vibration-proof connection
- Torque setting: 3 Nm
Compare WTB5 Terminal Block Variants
| Model | Colour | Typical Use |
|---|---|---|
| WTB5-BR | Brown | Live connection |
| WTB5-GY (This Product) | Grey | Alternate phase |
| WTB5-BL | Blue | Neutral |
| WTB5-GN | Green | Earth / bonding |
| WTB5-PK | Pink | Additional identifier |
When is the grey terminal block used?
Grey is typically used for alternate phase identification in multi-phase systems.
Does this block come with blanking pieces?
Yes – blanking inserts are supplied to cover unused ways safely.
Can it handle meter tails?
Yes – it’s suitable for splitting 100A meter tails into multiple consumer units.
Is the lid tamper-resistant?
Yes – the lid is lockable and sealable, ideal for compliance with DNO or site requirements.
- Model: WTB5-GY
- Rated Current: 100A
- Connection Points: 5-way
- Suitable Cable Sizes: 2.5 mm² – 35 mm²
- Screw Type: Hexagon screw clamp
- Lid: Lockable & sealable
- Torque Setting: 3 Nm
- Colour: Grey (alternate phase)
Install securely in a distribution board or junction enclosure. Designed for safe, colour-coded terminations. Work must be carried out by a qualified electrician.
- Torque terminals to 3 Nm
- Seal lid with lock if required by DNO
- Use blanking inserts for unused terminals
- Grey identification = alternate phase
