The Belcom FireFighter 430 Series Control Cable (product code 4302P2254-01, Enphase Europe order code CTRL-BL-EU-01) is the Enphase-approved CTRL cable for IQ Battery 5P energy storage systems across Europe. This 50-metre reel provides the control communication link between parallel IQ Battery 5P units and between the IQ Battery and the Communications Kit 2, carrying the low-voltage CTRL signal that co-ordinates battery management, charge/discharge control, and system communication. Manufactured by Belcom Cables to their FireFighter® Low Smoke Zero Halogen (LSZH) standard, the cable meets demanding fire performance requirements including IEC 60332-1 flame retardance and IEC 60754 halogen-free specification — essential for cables routed through inhabited buildings.
100m Max
Total CTRL Cable Per System
LSZH
FireFighter® Low Smoke Zero Halogen
⚠ Maximum System Length — 100 Metres: The total cumulative length of CTRL cable across the entire Enphase system must not exceed 100 metres. This includes all cable runs between batteries and between batteries and the Communications Kit 2. Exceeding this limit will cause the system to operate outside specification and may result in communication errors or battery management failures.
⚠ Read IQ Battery 5P Quick Install Guide First: Before installing CTRL cabling, read the Enphase IQ Battery 5P Quick Install Guide and/or the Communications Kit 2 Quick Install Guide. Correct screw terminal assignment is critical — CTRL signals are polarity-sensitive and must be wired to the correct terminals as specified in the Enphase-Belcom wiring table.
ℹ Enphase-Approved Cable for Europe: The Belcom FireFighter 430 Series (CTRL-BL-EU-01) is the Enphase-specified control cable for all European IQ Battery 5P installations, listed in Enphase's official technical note TEN-00016. This is the only pre-approved control cable for the UK and wider European market.
FireFighter® LSZH Construction
The outer jacket uses Belcom's proprietary FireFighter® SHF-1 LSZH compound, which produces negligible smoke and no halogen gases in the event of fire. This is critical for cables installed within occupied residential buildings — halogen-bearing cable sheaths release toxic and corrosive gases during combustion. Compliant with IEC 60754 (halogen-free) and IEC 61034 (smoke emission).
RS485 / CAN Bus Specification
The 430 Series is a 22AWG low-capacitance shielded cable designed for high-speed, interference-free RS485 data transmission — the same communication protocol used by Enphase IQ Battery systems. The double-shielded design (aluminium/polyester tape plus tinned copper braid at 65% coverage) provides comprehensive protection against electromagnetic interference in complex electrical installations.
Cable Construction Detail
The 4302P2254-01 variant is a 2-pair (2 × 2 × 22AWG) cable with stranded tinned copper conductors, polyethylene (PE) insulation, aluminium/polyester overall shield, stranded tinned copper drain wire, and tinned copper wire braid outer shield. Outer diameter is 8.25mm with a weight of 108 kg/km. CPR fire classification: Dca, s1, d2, a1.
Wiring Colour Code (Enphase CTRL Terminals)
Per the Enphase wiring table for CTRL-BL-EU-01: Terminal 1 (CTRL low) — white with blue stripe; Terminal 2 (CTRL high) — blue with white stripe; Terminal 3 (CTRL ground) — white with orange stripe; Terminal 4 (Not used) — orange with white stripe. Follow these assignments exactly as specified in the Enphase install documentation.
| Technical Specifications — Belcom 4302P2254-01 (CTRL-BL-EU-01) |
| Product Code |
4302P2254-01 |
| Enphase Order Code (Europe) |
CTRL-BL-EU-01 |
| Cable Series |
Belcom FireFighter® 430 Series |
| Formation |
2 × 2 × 22AWG (2 pairs) |
| Conductor |
Stranded tinned copper wire, 22AWG |
| Insulation |
Polyethylene (PE) |
| Overall Shield |
Aluminium/polyester tape + tinned copper braid (65% coverage) |
| Outer Jacket |
LSZH FireFighter® SHF-1 — Black |
| Outer Diameter |
8.25mm (±10%) |
| Rated Voltage |
600V |
| Temperature Range |
-20°C to +90°C |
| CPR Fire Classification |
Dca, s1, d2, a1 |
| Flame Retardant |
IEC 60332-1 (single cable); IEC 60332-3-24 (bunched cables) |
| Halogen Free |
IEC 60754 |
| Low Smoke |
IEC 61034 |
| Nominal Shield DC Resistance |
4.6 Ω/km |
| Cable Weight |
108 kg/km |
| Reel Length |
50 metres |
| Max CTRL Cable Length Per System |
100 metres (cumulative total) |
| Application |
Enphase IQ Battery 5P CTRL connections; RS485 / CAN Bus automation |
| Quality System |
Belcom Cables Ltd — ISO 9001 certified |
Why is the Belcom FireFighter cable specified for Enphase systems in Europe?
Enphase's IQ Battery 5P CTRL interface requires a shielded, low-capacitance RS485-capable cable for reliable battery management communication. The Belcom FireFighter 430 Series meets these electrical requirements while also satisfying European building regulations for LSZH cable in occupied premises. Enphase formally lists CTRL-BL-EU-01 as the approved European control cable in technical note TEN-00016.
How many batteries can I connect with one 50m reel?
One 50m reel provides sufficient cable for most residential installations. For a two-battery system the CTRL cable runs from the Communications Kit 2 to Battery 1 and then Battery 1 to Battery 2 — typical distances are well within 50m. Remember: the total cumulative CTRL cable length across the whole system must not exceed 100m.
Can I use a different cable for the CTRL connection?
In the UK and Europe, Enphase specifies only the Belcom CTRL-BL-EU-01 as the pre-approved cable. Using an alternative cable is not covered by Enphase's compatibility documentation. If you require an alternative for a specific project, consult your Enphase distributor — but the Belcom FireFighter 430 Series is the safe, warranted choice for standard UK installations.
What does LSZH mean and why does it matter for a home installation?
LSZH (Low Smoke Zero Halogen) means the cable jacket is formulated to produce minimal smoke and no halogen gases if it catches fire. Standard PVC-jacketed cable releases toxic hydrogen chloride gas during combustion, which can be lethal and corrosive to electrical equipment. LSZH cables are increasingly required by UK Building Regulations in escape routes and occupied spaces, and are best practice for all energy storage and solar installations within buildings.
Do I also need the Communications Kit 2 to use this cable?
Yes. The CTRL cable connects the IQ Battery 5P to the Enphase Communications Kit 2 INT, which enables wired communication between the IQ Gateway Metered and the IQ Battery 5P. The Communications Kit 2 and IQ Gateway Metered are sold separately and are required components of a complete IQ Battery 5P storage system.
