Safety Switch (RCD) Installation

Following Minister Michael Daly's announcement of the 12 December 2010 regarding proposed new laws that would mandate residual current devices (safety switches) in all NSW workplaces I can advise the Occupational Health and Safety Amendment (Residual Current Devices) Regulation 2011, commenced on Friday 18 February 2011.
Residual current devices – electrical outlet sockets
- Employers must ensure electrical socket power circuits are protected by residual current devices (RCDs)
- RCDs, as far as reasonably practicable are to be incorporated before or as part of the socket outlet
- This requirement commences 4 years after the commencement of the amending regulation.
Residual current devices – electrical articles
- Employers must ensure that certain electrical articles are protected by an RCD, these include:
- Hand-held electrical articles
- Articles that are moved while in operation
- Articles that are moved between operations that could result in damage to the article
- Articles used in construction work
- Articles used in a hostile operating environment
- This requirement commences 12 months after the commencement of the amending regulation.
Testing of residual current devices
- Employers must ensure that RCDs are regularly tested by a competent person
- Employers must replace faulty RCDs as soon as practicable
- Employers must keep a record of testing
An RCD is a safety device that disconnects a circuit when it detects an imbalance of the electric current. It works on the principle that the electricity flowing into a circuit must be equal to the current flowing out of a circuit. When a person receives a shock, it means some current is diverted through the body directly to earth.
If the RCD detects an imbalance in the electrical current, indicating a leakage to earth, it immediately cuts the electricity supply to prevent electrocution.
An RCD cannot detect all types of faults, for example if a person receives a shock between the active and neutral conductors. However, these circumstances are rare and the vast majority of incidents occur between the active conductor and earth, which is protected by an RCD.
If a person comes in contact with a live electrical conductor, electricity flows through their body, causing an electric shock. Effects can vary from a tingling sensation or muscular pain to breathing difficulties, burns and heart failure.
RCDs are extremely sensitive, disconnecting within 10 to 50 milliseconds of detecting a leakage current. This is usually 30 milliamps for domestic residences but may be lower in other locations such as hospitals. This stops the flow of electricity through someone's body to earth. Importantly, this response time is much faster than the critical section of the cardiac cycle and therefore significantly reduces the risk of death or serious injury.
RCDs also protect against fire caused by faults in appliances, tools and wiring. If these faults go undetected they could cause a fire or personal injury. RCDs provide a means of early fault detection
Being licensed electricians ATTS can install these RCD's, which will give you peace of mind and a blanket safety coverage to your site, protecting you and your employees.

