Dental Surgery Electrical Cost: UK Medical Location Guide 2026

Group 1 Requirements for Dental Surgeries

• Supplementary equipotential bonding — All extraneous-conductive-parts and protective conductors within the patient environment must be connected to a supplementary bonding bar. Minimum 4mm² copper bonding conductor. This limits touch voltage to safe levels during a fault.
• RCD protection — All circuits in the Group 1 medical location must have 30 mA RCD protection per BS 7671 Section 411. Individual RCBOs are recommended to avoid nuisance tripping of multiple circuits.
• Socket outlet identification — Socket outlets in the medical location should be clearly identified (coloured or labelled) to distinguish them from general-purpose outlets.
• Protective conductor monitoring — The integrity of the protective conductor for circuits supplying medical equipment should be monitored where disconnection could present a hazard.

Per-Chair Electrical Requirements

• Chair unit hardwired connection — 1 to 3kW, dedicated circuit, local isolator adjacent to the chair. Some chair units require a 20A supply. Cost: £150 to £300 for the dedicated circuit and isolator.
• Ancillary socket outlets — 2 to 4 double sockets per treatment room for ultrasonic scaler, additional curing light, patient monitor, and ancillary equipment. Cost: £100 to £200 for outlets with Section 710 compliance.
• Dental operating light — Typically ceiling-mounted with a dedicated connection point. LED dental lights draw 50 to 150W. Connection and ceiling rose: £80 to £150.
• IT and data — 2 data points per treatment room for the practice management system and digital imaging. Cat6A data points: £80 to £150 each installed.

• Intraoral X-ray — 1 to 2kW, dedicated 13A circuit per X-ray unit. Radiation warning light circuit wired to the X-ray control. Cost: £200 to £400 per unit including dedicated circuit and warning light.
• OPG / Panoramic X-ray — 3 to 5kW, dedicated 20A or 32A circuit. Requires stable voltage supply — consider a dedicated radial from the main board. Radiation warning light and control circuit. Cost: £400 to £800 including dedicated circuit, warning lights, and containment.
• CBCT scanner — 5 to 10kW, dedicated 32A circuit, often with specific voltage tolerance requirements. Some scanners require UPS protection. Cost: £800 to £1,500 for the electrical supply including UPS if needed.
• Dental compressor — 1.5 to 5kW, dedicated circuit, typically located in a plant room. Oil-free dental compressors require a clean air supply and appropriate ventilation. Starting current can be 3 to 5 times running current — size the cable and protective device accordingly. Cost: £300 to £600 for the circuit, isolator, and ventilation extraction fan supply.
• Autoclave (steriliser) — 2 to 6kW, dedicated 20A or 32A circuit in the decontamination room. Some autoclaves require a dedicated water supply with an associated water treatment unit (100 to 300W). Cost: £200 to £400 for the dedicated circuit.

• Single surgery practice (£8,000 to £12,000) — 1 treatment room with Section 710 bonding, 1 intraoral X-ray, compressor circuit, decontamination room with autoclave circuit, reception wiring, IT cabling, emergency lighting, consumer unit with RCBOs and SPD. 1 to 2 weeks installation.
• 3-surgery practice (£15,000 to £20,000) — 3 treatment rooms with Section 710 bonding, intraoral X-ray in each, OPG room, compressor and suction circuits, decontamination room, staff room, reception, IT infrastructure, full emergency lighting, 3-phase distribution. 2 to 3 weeks installation.
• Large multi-surgery practice (£20,000 to £25,000+) — 5+ treatment rooms, CBCT scanner with UPS, multiple compressors, full IT server room, digital workflow integration, premium clinical lighting, air conditioning supplies, comprehensive Section 710 compliance, sub-distribution boards. 3 to 4 weeks installation.

• BS 7671:2018+A4:2026 Section 710 — Medical locations. Group 1 classification for dental treatment rooms. Supplementary bonding, RCD protection per BS 7671 Section 411, socket identification, and protective conductor monitoring.
• HTM 06-01 — Department of Health guidance on electrical installations in healthcare premises. Covers safety, resilience, and design criteria for medical location installations.
• Ionising Radiation Regulations 2017 — Applies to X-ray installations. The dental practice must have a radiation protection adviser and the X-ray rooms must be designed to contain radiation. Electrical cable routes through lead-lined walls require specialist sealing.
• CQC registration requirements — The Care Quality Commission inspects dental premises. A valid EIC and regular EICR (typically 3-yearly for medical locations) are required as part of CQC compliance evidence.