Completion Certificate (Sub-50kVA)
The Irish Electrical Completion Certificate (No. 1) is issued by a Safe Electric registered electrical contractor upon completion of a new electrical installation or full rewire with a supply capacity below 50kVA. It certifies that the installation has been designed, constructed, inspected, and tested in accordance with I.S. 10101 (National Rules for Electrical Installations) and is safe for use. This certificate is mandatory for all new domestic and small commercial electrical installations in Ireland. CertBox produces the supporting test record; the Completion Certificate itself must be issued through Safe Electric's Electronic Certification System (ECS).
Sample Completion Certificate No. 1 certificate

Sample Completion Certificate No. 1 with fictional data. All personal details shown are fake.
What it covers
- Installation address, client details, and description of work
- Earthing system (TN-S, TN-C-S, TT) and supply characteristics
- Ze at origin and prospective fault current (Ipf)
- Distribution board make, type, and main switch rating
- Circuit schedule with cable sizes, protective devices, and ratings
- Test results per circuit: R1+R2, Zs, insulation resistance, polarity, and RCD trip time
- Safe Electric registration number and contractor signature
Who needs a Completion Certificate No. 1?
Create your Completion Certificate No. 1 with CertBox
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Download it, email it to your customer or share a link. Sending is the part you pay for.
Frequently asked questions about Completion Certificate No. 1
When is a Completion Certificate No. 1 required in Ireland?
Who can issue an electrical completion certificate in Ireland?
What is the difference between I.S. 10101 and BS 7671?
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Related certificates
Completion Certificate No. 2
Record your I.S. 10101 test results for Irish installations 50kVA and above. The supporting record for your Safe Electric Completion Certificate, not a replacement for it.
ElectriciansCompletion Certificate No. 3
Record I.S. 10101 electrical alterations in Ireland: consumer unit upgrades, circuit additions, extensions. The supporting record for your Safe Electric Completion Certificate No. 3.
ElectriciansPeriodic Inspection Test Record
Record periodic inspections of Irish electrical installations: Code 1 to 4 observations and circuit schedule. The supporting record for your Safe Electric PIR, not a replacement for it.