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electrical4less_mirek Space-Saving 3 Phase Distribution for Commercial & Industrial Installs
Table of contents
When wall space is tight but safety and compliance can’t be compromised, compact horizontal TP&N distribution boards offer the perfect solution. Designed for three-phase installations with just 2 or 3 usable TP&N ways, these boards reduce the overall width without altering depth—giving you full functionality in a smaller footprint.
At Electrical4Less, we stock high-quality models including the TPNH-S, TPNH02-100, TPNH03-100, and TPNH03-100S. Each board is pre-fitted with a 100A 4 Pole Main Switch, and several models also include a factory-installed Type 2 SPD for surge protection.
🔧 Designed for Low-Profile, Wall-Mounted Installations
Unlike standard vertical boards, these horizontal TP&N units allow installation in tight spaces without sacrificing usability. Thanks to the compact size, they’re ideal for:
- Garages with three-phase EV charging
- Utility rooms and plant spaces
- Commercial switchboards
- Workshops with limited vertical clearance
They maintain full enclosure depth but save space by offering a limited number of outgoing ways—ideal for small-scale distribution tasks.
⚙️ Built-In 100A Main Switch – With Twin Screw Terminals
All models come equipped with a 100A 4 Pole Switch Disconnector Incomer, which features double twin screw terminals to ensure meter tails are properly and securely clamped. This design reduces the risk of poor connections and offers peace of mind for installers working to BS 7671 standards.
⚡ Optional Surge Protection Built In – Type 2 SPD Models
Select models like the TPNH-S and TPNH03-100S are fitted with a Type 2 Surge Protective Device (SPD). This protects connected circuits from switching surges and transient voltages and is wired directly to the busbar—no extra MCB required
📏 Product Comparison – Horizontal TP&N Boards (All 3-Phase)
| Model | Usable 3-Phase Ways | Width | Type 2 SPD | Includes 100A Main Switch |
|---|---|---|---|---|
| TPNH02-100 | 2 TP&N | 325mm | ❌ No | ✅ Yes |
| TPNH03-100 | 3 TP&N | 395mm | ❌ No | ✅ Yes |
| TPNH03-100S | 2 TP&N | 395mm | ✅ Yes | ✅ Yes |
Let me know if you’d like me to revise the blog post or product listings with this corrected table.
All models are finished in RAL7035 powder-coated steel and fully compliant with BS EN 61439-1&3.
⚠️ Compatible RCBOs – Perfect for This Range
To complete your installation, we recommend Live Electrical 3P+N Type A RCBOs—fully compatible with this TP&N board range.
✅ Key Specs:
- 3P+N (three phase + neutral)
- 30mA Type A RCD protection
- 10kA breaking capacity
- Fully compliant with BS EN 61009
🔩 Full Product Listing
🔗 Shop RCBOs here:
👉 Live Electrical Three Phase RCBOs
❓ Frequently Asked Questions – Compact Horizontal TP&N Boards
A: No. The internal busbar is rated for 100A maximum. Exceeding this would compromise safety and compliance.
A: These units are rated IP20, making them suitable for indoor installations in dry, protected environments.
A: Absolutely. These boards are fully compatible with 3P+N RCBOs. We recommend the affordable, high-quality range from Live Electrical, one of the few UK brands offering full 3-phase RCBOs for TP&N boards.
🛒 Why Choose Electrical4Less?
- Fast delivery across the UK
- Click & Collect available from Fulham, London
- Competitive trade pricing and bulk discounts
- Members of the IBA Buying Group and EDA
- Friendly service, expert support
Final Thoughts
The horizontal TP&N board range offers a compliant, compact alternative for three-phase installations where space is limited. With a smaller footprint, built-in 100A switches, and SPD options, these units are ready for modern installs. Pair them with compatible Live Electrical RCBOs for a robust, regulation-ready setup.
👉 Shop now Live Electrical Horizontal Three Phase Distribution Boards and take control of your 3-phase distribution with confidence. Thank you for reading “Compact Horizontal TP&N Distribution Boards – Installer’s Guide”
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