🇮🇪 Republic of Ireland

Electrical Design to I.S. 10101 across the Republic of Ireland

VoltPro designs electrical installations for projects throughout the Republic of Ireland to I.S. 10101, the National Rules for Electrical Installations published by NSAI, rather than the UK's BS 7671. One design team for projects on both sides of the border.

✓Qualified to design to I.S. 10101 and to work in the Republic of Ireland
✓Our principal designer is a member of Engineers Ireland
Get a Quote ROI Services
Georgian red-brick terraced houses on a street in Dublin
⚡ I.S. 10101 Electrical DesignProjects across the Republic of Ireland
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Designs to I.S. 10101
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Our principal designer is a member of Engineers Ireland
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NI (BS 7671) & ROI (I.S. 10101)

Our Services in the Republic of Ireland

Design, supply applications and compliance support for developers, contractors, businesses and landlords across Ireland.

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Electrical Design to I.S. 10101

Complete electrical designs for residential, commercial and industrial projects, prepared to the current National Rules for Electrical Installations.

  • Circuit design, cable sizing and protective device selection
  • Earthing and bonding designed for ESB Networks TN-C-S supplies
  • Distribution boards, schedules and single-line diagrams
  • Drawings and documentation your Registered Electrical Contractor can build from
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ESB Networks Supply Applications

The Republic of Ireland version of our NIE supply service: we work out the Maximum Import Capacity you need and prepare the technical side of your ESB Networks application.

  • Maximum demand and Maximum Import Capacity (kVA) calculations
  • Load and capacity details for new domestic, commercial and multi-unit connection applications
  • Increased supply (MIC change) applications for existing connections
  • Liaison with ESB Networks through to quotation and connection agreement
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EV Charging Design

Charge point design for homes, apartment blocks, workplaces and car parks to I.S. 10101 Part 722, which was revised in the 2024 amendment.

  • Supply capacity checks and load management
  • Charger layout, cable sizing and protection
  • Earthing arrangements for EV supplies
  • Supply applications where extra capacity or a dedicated connection is needed
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Compliance Reviews

Independent reviews of existing installations, certificates and periodic inspection reports against I.S. 10101, with clear, prioritised recommendations.

  • Review of completion certificates and periodic inspection reports
  • Support for landlords against the minimum standards for rented housing
  • Fire detection, alarm and emergency lighting reviews for multi-unit buildings
  • Remedial work specified for your Registered Electrical Contractor

I.S. 10101 at a Glance

What clients and contractors should know about designing and building to Ireland's National Rules for Electrical Installations.

The standard

Ireland's own wiring rules

I.S. 10101 sets the requirements for the design, erection and verification of low-voltage electrical installations in Ireland. It is published by the National Standards Authority of Ireland (NSAI) and replaced the previous rules, ET 101:2008.

It shares its international foundations with BS 7671 but is a separate standard with Irish-specific requirements, so a design produced to BS 7671 for Northern Ireland needs to be checked against I.S. 10101 before it's used south of the border.

Current edition

I.S. 10101:2020 + A1:2024

Amendment A1:2024 added Part 718 (communal facilities and workplaces), revised Part 722 (supplies for electric vehicles) and turned the energy efficiency annex into a new Chapter 8, including prosumer installations such as solar PV with battery storage.

NSAI's current consolidated version is I.S. 10101:2020+AC2:2025, which includes a 2025 corrigendum. We design to the current edition.

Certification

Safe Electric and Registered Electrical Contractors

Under the Electricity Regulation Act 1999 (as amended), restricted electrical works in the Republic of Ireland can only be carried out and certified by a Registered Electrical Contractor (REC) under the Safe Electric scheme, which is regulated by the CRU. The REC must issue a Completion Certificate for electrical works other than minor works, once the work is installed and tested.

ESB Networks will only connect a new installation once a validated completion certificate has reached it through Safe Electric.

Designer and installer

How our role fits

VoltPro provides the design, calculations and documentation. Your REC installs, tests and certifies the installation and submits the completion certificate. A clear I.S. 10101 design makes their job, and the certification, more straightforward.

TopicNorthern Ireland / UKRepublic of Ireland
Wiring standard BS 7671 (IET Wiring Regulations) I.S. 10101 (NSAI National Rules for Electrical Installations)
Network operator NIE Networks ESB Networks
Earthing PME (TN-C-S) supplies are common; the network provides the earth terminal TN-C-S is the standard for new ESB Networks LV connections, with one neutral–earth connection point at the main supply point and an earthing conductor from the main earthing terminal to the installation's own earth electrode
Protection RCD and AFDD requirements set by BS 7671 I.S. 10101 requires RCD protection on lighting circuits in homes and recommends AFDDs for circuits in locations with particular fire risk
Certification BS 7671 certificates and reports (EIC, MEIWC, EICR) Safe Electric Completion Certificates issued by a Registered Electrical Contractor; periodic inspection reports under Chapter 6 of I.S. 10101
Rented homes NI: inspection and test at least every five years under the 2024 private tenancy regulations; HMOs licensed under the HMO Act (NI) 2016 Housing (Standards for Rented Houses) Regulations 2019: electricity installations kept safe and in good repair; fire detection and alarm system and fire blanket; emergency lighting in common areas of multi-unit buildings. Enforced by local authorities

General information only, not legal advice. Requirements depend on your project. For Northern Ireland landlord rules see our Landlord & HMO Compliance service.

How a Republic of Ireland Project Works

Send us your drawings and project details by email and we'll take it from there.

1

Send Your Details

Email drawings, site location and the loads you're planning

2

Design to I.S. 10101

We produce the design, calculations and drawings

3

ESB Networks

We prepare the technical details for your supply application

4

Build & Certify

Your Registered Electrical Contractor installs, tests and certifies