The Health and Safety Executive charged Gas Safe, as part of their approval for registering gas operatives, to develop the Nationally Accredited Certification Scheme (ACS). The scheme requires individual gas fitting operatives to be assessed on their competence to carry out gas work safely, and to be certified to that effect by a certification body which has demonstrated conformity with European Standards EN45013 and accredited by the United Kingdom Accreditation Service (UKAS).
The scheme as a whole is intended to promote consistency in the delivery of assessment and verification of a gas fitting operative’s competence to undertake gas work.
What is involved in ACS assessment?
Under this scheme training and assessments are kept entirely separate. A panel of experts, from all corners of the industry, set the assessment standard. All individuals who go forward for assessment will be required to complete the following:-
- Practical assessment
- Written/questionnaire assessments
- Where necessary, correctly answering any oral questions posed by an Assessor
What assessments are contained in the ACS?
The ACS consists of a Core assessment in the work area required namely:
- Domestic Natural Gas (CCN1)
- Domestic Liquefied Petroleum Gas (CCLP1)
- Commercial Natural Gas (COCN1)
- Commercial Natural Gas Pipe Installer [Limited Scope] (COCNPI1LS)
Plus an appliance assessment applicable to the work undertaken.
The domestic appliance assessments are as follows:
- Gas cooking appliances (CKR1)
- Gas fires and wall heaters (HTR1)
- Gas instantaneous water heaters (WAT1)
- Gas boilers and circulators (CEN1)
- Gas fired ducted air heaters (DAH1)
- Gas laundry appliances (LAU1)
- Gas leisure appliances (LEI1)
- Gas meters (MET1)
- Combustion Performance Analysis (CPA1)
The commercial assessments are as follows:
- First Fix Pipe Installations (ICPN1
- First Fix Pipe Installations (ICPN1(LS))
- Tightness Testing and Purging (TPCP1)
- Tightness Testing and Purging (TPCP1a)
- First Fix Appliance/Equipment (ICAE1 (LS))
- First Fix Appliance/Equipment (ICAE1)
- Direct Fixed Heating Appliances (CDGA1)
- Overhead Radiant Plaque and Radiant Tube Heaters (CORT1)
- Indirect Fixed Heating Appliance and Equipment (CIGA1)
- Boosters and Compressors (CBHP1)
- Catering Core Safety (CCCN1)
- Upgrade from Commercial Core to Commercial Catering (CoCATA1)
- Open and Solid Top Ranges (COMCAT1)
- Grills, Griddles and Fryers (COMCAT3)





