Overview
IEC 60364-7-701:2006 specifies safety requirements for low-voltage electrical installations in locations containing a fixed bath (bathtub) or shower. It covers the electrical installation and defined surrounding zones (zones 0, 1 and 2), protective measures to reduce risk of electric shock, and special requirements for equipment installed in these zones. The standard excludes emergency showers (industrial/laboratory) and notes additional rules for prefabricated bath/shower units and medical treatment areas.
Key topics and technical requirements
- Zone definitions (bath/shower zones)
- Zone 0: interior of the bath tub or shower basin (for showers without a basin the height is 10 cm).
- Zone 1: space above the bath/shower up to the highest fixed shower head or 225 cm above finished floor (whichever is higher); includes the area circumscribing the bathtub or defined horizontal distance for showers without basins. The space under the bath is considered zone 1.
- Zone 2: extends from the boundary of zone 1 outward to 60 cm horizontally and up to the same horizontal plane as zone 1. (National variations are noted in the standard.)
- Protection against direct contact
- Equipment in zones 0–2 must provide protection by barriers/enclosures with at least IPXXB or IP2X, or by insulation capable of withstanding 500 V a.c. RMS for 1 minute.
- Additional protection
- Residual Current Devices (RCDs) with rated residual operating current ≤ 30 mA are required to protect circuits in rooms containing a bath or shower, with limited exceptions (e.g., SELV/PELV or electrically separated single-equipment circuits). National derogations (e.g., on PELV use) are noted.
- Supplementary local equipotential bonding must connect protective conductors to exposed-conductive and accessible extraneous-conductive parts (water, heating, gas, structural metal parts). Bonding conductor cross-sections follow IEC 60364-5-54 requirements.
- Scope limitations and notes
- Does not apply to emergency showers or some specialized medical installations. Country-specific deviations and additional notes are included in the standard.
Applications and who uses this standard
- Designers and engineers specifying bathroom and shower electrical systems
- Electricians and installers implementing safe wiring, bonding and earthing in residential, hotel and commercial washroom projects
- Building inspectors, safety assessors and certification bodies verifying compliance with bathroom electrical safety requirements
- Facility managers and architects planning fixed bath or shower installations and equipment placement
Related standards
Keywords: IEC 60364-7-701, bathroom electrical safety, low-voltage electrical installations, bath shower zones, RCD, equipotential bonding, IP2X, SELV, PELV.
Open preview (PDF)Low-voltage electrical installations - Part 7-701: Requirements for special installations or locations - Locations containing a bath or shower
