The EICR observations will be coded C1, C2, C3 and FI accordingly. So, what do these observation codes mean? A Code 1 (C1) observation means 'Danger Present'. This code means that there is a risk of injury and immediate remedial action is required. Conclusion What Are C1, C2 and C3 Tyres? C1, C2 and C3 tyres are the three categories of tyres regulated by the European Union under the Regulation on the general safety of motor vehicles (COM (2008) 316). These tyres are commonly used on passenger vehicles, light and heavy-weight commercial vehicles, and Formula One cars. There are six levels of language proficiency (A1, A2, B1, B2, C1, C2) according to the CEFR scale. They are grouped into three broader levels: A1-A2 (Basic User), B1-B2 (Independent User), and C1-C2 (Proficient User). C1 - There is a danger present, risk of injury and immediate remedial action required; C2 - There is a potential danger present and urgent remedial work is required; C3 - Improvement is recommended; Issuing codes. It is not hard to find discussions between electricians on line who are reluctant to issue a C2 code. This basically states that, in general, sockets without RCD protection would be considered a C3 - Improvement Recommended. This is more serious and would be coded a C2 -Potentially Dangerous in instances where portable outdoor equipment could be used from that circuit. C1 - Very low. Heated buildings with clean atmosphere. In this environment you can use untreated steel or painted steel. The C1 class includes materials that are not exposed to corrosion in normal atmospheric air. This can be: Schools; Shops; Hotels; C2 - Low. Atmosphere with little or no degree of pollution. Country atmosphere where Deficiency in C1, C2, C3, MBL, MBL-associated serine protease 2 (MASP-2), factor H, factor I, or complement receptor 2 (CR2): Susceptibility to recurrent bacterial infections Deficiency of C5, C9, factor B, factor D, or properdin: Susceptibility to neisserial infections Meningococcal Diseases Meningococci ( Neisseria meningitidis ) are gram The Common European Framework of Reference for Languages: Learning, Teaching, Assessment, abbreviated in English as CEFR, CEF, or CEFRL, is a guideline used to describe achievements of learners of foreign languages across Europe and, increasingly, in other countries.The CEFR is also intended to make it easier for educational institutions and employers to evaluate the language qualifications of Nxcg6.