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PERIODICS FOR PERFORMANCE OF CONTROL | |||
| Subject of control | Object of control | Periodicity of control | Document, reference |
| Earthing systems | Resistance of earthing conductors to earth | At least once a year | Ordinance №16-116 for TEE from 08.02.2008. , art. 261 (1) item 6 and (3) |
| Resistance of the neutral conductor to ground in a network with a directly grounded star center in which zeroing is used | At least once every 5 years | Ordinance №16-116 for TEE from 08.02.2008. , Article 261, items 7 and (4) | |
| Protective loop impedance (L-PEN) | At least once every 5 years | Ordinance №16-116 for TEE from 08.02.2008. ,, Article 267, (2) item 3 | |
| At each initial commissioning of systems, equipment, machines, devices, installations, etc. | Ordinance №16-116 for TEE from 08.02.2008. ,, Article 267, (3) item 1 | ||
| After each relocation and commissioning of a new workplace facilities, machinery, equipment, etc.. | Ordinance №16-116 for TEE from 08.02.2008. ,, Article 267, (3) item 2 | ||
| After repairs and reconstructions affecting the efficiency of zeroing (affecting electrical installations) | Ordinance №16-116 for TEE from 08.02.2008. ,, Art. 267, (3) v.3 | ||
| Circuit breakers (CB) and earth resistance of the safety earth | Apparatus for protection against residual current (Nitrogen) or CB (from currents with zero sequence) | At least once a year | Ordinance №16-116 for TEE from 08.02.2008. ,, Article 266, (3) |
| Insulation resistance | MS,S control panels, etc. Power and lighting installations, secondary circuits, power receivers | Upon commissioning and deadlines set by the energy sector | Ordinance №16-116 for TEE from 08.02.2008. ,, 266, (1) and (2) |
| Lightning protection earthing | Resistance of individual grounding conductors | At 1, 2 and 3 years depending on the category | Ordinance №4 on lightning protection 22.12.2010 Article 177 (2) |
| Level of general illumination and illumination at control points | At least once a year | Ordinance №16-116 for TEE from 08.02.2008. ,, Art. 391.1 and 2 | |
| Noise exposure level in the work environment | At least once a year | Ordinance №7 of 23.09.1999 ,, For work equipment art. 135 | |
| Microclimate | The periodicity of the measurements is in accordance with the deadline set by the employer for reviewing the risk assessment. | Ordinance №7 of 23.09.1999 ,, Art. 18, para 1 | |
| Air conditioning and ventilation systems | At each initial commissioning. When using an air conditioning or ventilation system, workers must not be exposed to harmful air currents. | Наредба №7 от 23.09.1999г. , чл.124 и чл. 127 ал.1 | |
