A licensed electrical installation must be inspected and certified fit for operation by the appointed Licensed Electrical Worker (LEW) at least once a year. Installations in higher-risk settings or premises need more frequent inspections and certifications.
The required inspection frequency is outlined in this table.
Note that your appointed LEW may recommend a suitable inspection frequency, maintenance schedule, and additional safety measures after assessing the operating conditions of your electrical installation, taking into account wear and tear.
Table: Inspection Frequency for Licensed Electrical Installations
| Type of Installation | Inspection Frequency | Remarks |
|---|---|---|
| Construction worksites | At least once per month | Electrical installations at construction worksites are subject to more wear and tear, so monthly inspections are necessary to ensure they remain safe to use. |
| Trade fairs, mini-fairs, festive lightings, etc. | Daily | Conduct safety inspections daily to ensure all parts accessible to the public remain safe, and protective devices are in good working condition. |
| Multi-tenanted buildings, condominiums, etc. | At least once in six months | Communal electrical services like risers, lightings, socket-outlets, and protective systems should undergo frequent inspections for public safety. |
| High voltage installations* | Inspection and maintenance schedule shall be worked out by the appointed LEW, but inspection shall be carried out at least once a year | Consult the manufacturers of high voltage equipment or apparatus for maintenance requirements. |
| Others | Annually | Inspect the electrical installation before renewing the electrical installation licence. |
*Electrical installations taking electricity supply at a voltage level of 6.6kV and above.