Part P relates to the safety of electrical installation stipulated in the building regulations and falls under the control of the local authority. Part P can be divided into two areas: Non-notifiable which means the local authority don't need to be inform of new electrical work. However the householder must confirm this. Notifiable means the local authority must be contacted before commencement of work. A building control officer will be assign, who will inspect the new electrical work and that it complies with current building regulation. If Building control is satisfied that the job meets the necessary requirements, it will be sign off.
The safe use of electrical devices in the bathroom or shower is cover by IEE wiring regulations (17th edition). Specific areas of the bathroom are sectioned off and class outside zone, zone 0, zone 1 and zone 2. This will determine the IP rating of the electrical device to be fitted. IP is an acronym for Ingress protection which is a measure of the resistance of moisture penetration. The higher the IP number the better the protection.
The competent person scheme certify the work of a individual meets current building regulations and does away with need to file building notice or using a building control officer. NICEIC is one of many regulatory bodies which assess the safe practice and proficiency of electricians. A NICEIC registered electrician can issue a certificate which certifies that the new electrics comply with current building regulation.