125A 3 Phase Distribution Board – 12 Way (WTPN12-125SP)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WTPN12-125SP is a 12-way 125A three-phase distribution board designed for commercial and industrial installations that require a higher circuit count with room for structured distribution. Supplied as standard with a 125A 4-pole main switch, an integrated Type 2 Surge Protection Device (SPD), and a 3-pole 32A MCB, it delivers...
The WTPN12-125SP is a 12-way 125A three-phase distribution board designed for commercial and industrial installations that require a higher circuit count with room for structured distribution. Supplied as standard with a 125A 4-pole main switch, an integrated Type 2 Surge Protection Device (SPD), and a 3-pole 32A MCB, it delivers compliant and dependable power distribution straight out of the enclosure.
With 12 outgoing ways, this board is well suited to plant rooms, workshops, retail units, and light industrial sites running multiple three-phase circuits across lighting, power, and dedicated equipment. The durable IP40 steel enclosure supports tidy cable management and straightforward access for inspection, maintenance, or future circuit additions.
Installer Tip: A sensible step-up where 8 ways start to feel restrictive — commonly used on sites with separate lighting, power, HVAC, and machinery circuits that need clear segregation.
Key Features
- 125A 4-pole main switch – secure three-phase isolation and control
- Type 2 SPD pre-installed – protection against transient overvoltage events
- 3-pole 32A MCB included as standard – dedicated outgoing protection aligned with 125A TPN specification
- 12 outgoing ways – increased capacity for structured commercial distribution
- IP40 steel enclosure – 1.2mm heavy-duty construction for long-term reliability
- Neutral and earth terminals fitted both sides, fully shrouded for safety
- Accepts 6kA MCBs and RCBOs without modification
- Removable gland plate for clean and adaptable cable entry
- Manufactured in compliance with BS EN 61439-3
Compare 125A 3 Phase Distribution Board Variants
| Model | Ways | Main Device | SPD |
|---|---|---|---|
| WTPN04-125SP | 4 | 125A 4-pole Main Switch | Type 2 SPD |
| WTPN06-125SP | 6 | 125A 4-pole Main Switch | Type 2 SPD |
| WTPN08-125SP | 8 | 125A 4-pole Main Switch | Type 2 SPD |
| WTPN12-125SP (This Product) | 12 | 125A 4-pole Main Switch | Type 2 SPD |
| WTPN16-125SP | 16 | 125A 4-pole Main Switch | Type 2 SPD |
| WTPN24-125SP | 24 | 125A 4-pole Main Switch | Type 2 SPD |
What types of installs suit a 12-way three-phase board?
The 12-way model is commonly used on commercial and light industrial sites with multiple three-phase circuits, such as plant rooms, workshops, and retail units.
Does this board include surge protection?
Yes. All WTPN boards are supplied with an integrated Type 2 SPD as standard.
Is a 3-pole MCB included with this board?
Yes. The WTPN12-125SP includes a 3-pole 32A MCB as part of the standard configuration.
Can this board replace an 8-way unit?
Yes. If additional circuits are required or future expansion is planned, the 12-way board provides extra capacity without stepping up to the larger 16 or 24-way enclosures.
Which breakers are compatible with this board?
This board accepts our full range of 6kA MCBs and RCBOs without modification.
- Model: WTPN12-125SP
- Rated Current: 125A
- Ways: 12
- Main Switch: 125A 4-pole isolator
- Outgoing Protection: 3-pole 32A MCB (included)
- Surge Protection: Type 2 SPD (integrated)
- Device Compatibility: Accepts up to 6kA MCBs and RCBOs
- Construction: 1.2mm steel enclosure, IP40
- Compliance: BS EN 61439-3
- Mounting: Keyhole wall mount
This board is supplied pre-configured and ready for installation by a qualified electrician.
- Keep SPD earth connections as short as possible for effective surge protection
- Allow adequate clearance for the 12-way enclosure footprint
- Use suitable glands with the removable gland plate for tidy cable entry
- Verify isolation and carry out full testing prior to handover
