IEC 60364-7-701:2019

Overview

IEC 60364-7-701:2019 specifies safety requirements and technical guidelines for low-voltage electrical installations in locations containing a bath or shower. It applies to both indoor and outdoor settings where a bath tub and/or shower is permanently installed. This standard is crucial for ensuring electrical safety in these wet environments by defining protective measures and equipment specifications tailored to the unique risks associated with baths and showers.

The standard sets out the extent and boundaries of such locations, which include:

• The lowest finished floor level.
• A horizontal plane 3 meters above that floor level.
• A vertical virtual surface 4 meters away from the fixed water outlet.
• A volume within walls, floor, and ceiling borders measured up to 6 cm deep.

It also covers fixed electrical installations in mobile environments like caravans, mobile homes, and shower containers. However, it excludes emergency showers used in industrial or laboratory environments.

This third edition (2019) replaces the 2006 version, providing technical revisions including improved zone definitions and clarified scope application.

Key Topics

Scope and Applicability

• Applies to permanent bath/shower locations indoors or outdoors.
• Extends to mobile installations with fixed baths or showers.
• Excludes emergency and specialized medical shower installations.
• Includes prefabricated units reference for further compliance (IEC 60335-2-105).

Zoning and Location Boundaries

• Defines precise dimensional zones around the bath/shower for installation requirements.
• Zones help categorize risk levels and dictate electrical equipment standards per zone.

Safety and Protection Measures

• Comprehensive protection against electric shock is mandated.
• Use of automatic disconnection of supply to prevent hazards.
• Extra-low voltage systems using SELV (Separated Extra-Low Voltage) and PELV (Protective Extra-Low Voltage) are recommended to improve safety.
• Additional protective measures may include residual current devices (RCDs) and insulation requirements.

Selection and Installation Requirements

• Wiring systems must be selected and installed to withstand environmental conditions, such as moisture and mechanical impact.
• Devices used for protection, isolation, switching, and control must conform to strict standards to maintain safety within defined zones.
• Installation practices must align with both the particular requirements in IEC 60364-7-701 and the general parts of IEC 60364 series.

Definitions and Terminology

• Specific terms and definitions tailored to installations with baths and showers are provided, ensuring clarity and uniform understanding across applications.

Applications

IEC 60364-7-701:2019 is applicable to a wide range of environments where safety relating to electrical installations near water is critical, including:

• Residential bathrooms with baths or showers.
• Hotel and hospitality facilities.
• Recreational vehicles (RVs), caravans, and mobile homes containing fixed baths or showers.
• Prefabricated bath/shower units.
• Outdoor bath/shower installations such as pool houses or garden showers.

By adhering to this standard, designers, engineers, and installers ensure:

• Enhanced protection from electrical hazards in wet or damp areas.
• Compliance with international safety norms.
• Consistency in electrical safety frameworks across diverse installation types.
• Risk mitigation against electrical shock or accidents in bath and shower environments.

Related Standards

For comprehensive low-voltage electrical safety, IEC 60364-7-701:2019 should be used in conjunction with other parts of the IEC 60364 series and related standards, including but not limited to:

• IEC 60364-4-41:2005 – General rules for protection against electric shock.
• IEC 60364-1 to IEC 60364-6, 8 – Core parts of the IEC 60364 series covering general requirements, wiring systems, circuit protection, and energy efficiency.
• IEC 60335-2-105 – Safety of household and similar electrical appliances – particular requirements for bath or shower units.
• Relevant mobile and recreational vehicle electrical installation standards.

Together, these standards provide a robust framework for the design, installation, and verification of safe electrical systems in locations containing baths and showers.

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Keywords: IEC 60364-7-701, low-voltage electrical installations, electrical safety, bath and shower electrical requirements, protection against electric shock, SELV, PELV, wiring systems, safety standards, electrical zones, mobile homes electrical standards, shower electrical installation.