Mark Brown Electrical
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What Our Customers Say About Us

"Mark recently completed a number of jobs round our house in Coogee. We were pleased when he was able to drop by on the day we called to give us a free quote which we accepted. Within 2 days the work was completed with minimal fuss. Great work and will use again."

Steve and Angela in Clovelly

"I own and operate a clothing store in Bondi Junction and needed a few additional downlights. I found Marks manner on the phone to be pleasant which was a nice change from some of the other electricians I had tried. The downlights turned out great!"

Dave, Bondi Junction

Why You Should Call Mark Brown Today

  • 1. We arrive on time, every time.
  • 2. All jobs completed right first time or fixed for free.
  • 3. Agreed pricing before we get the tools out.
  • 4. All our staff are polite, courteous, and qualified tradesman.
  • 5. We love the work we do.

Safety Switches/Residual Current Devices

Residual Current Device, RCD, is an electrical wiring device, a safety switch, which has become a mandatory part of Australian housing electrical codes since 1991. The use of Residual Current Devices will be mandatory in workplaces by January 1, 2013, increasing the safety of workers using electricity to perform their job duties. The safety switches, RCDs, are designed to shut off the electrical supply when a leakage or change in current occurs. A difference of electrical current of 0.3mA between the active and neutral conductor causes the current to be shut off, thereby averting the chance of injury by electrical shock.

Purpose of the Residual Current Device

The purpose of the Residual Current Device is the prevention of electrocution of people while manipulating electrical cords, tools and appliances. The most common cause of death by electrical shock can occur within 25-40 milliseconds, so a Residual Current Device detects a leakage of current before it can pass into the operator. RCDs measure the current between the live and neutral conductor. When the sum of the current changes or does not remain zero, leakage is detected and the device opens its contacts to stop accidental electrocution.

RCDs, Better Than Circuit Breakers

Prior to 1991, a large safety switch protected a group of circuits which caused the loss of power to all circuits, not just the defective line. Residual Current Devices also have a built-in test button which allows the operator to prove functionality at the connection instead of the main circuit breaker box.

Danger, Will Robinson, Danger!

A Residual Current Device cannot remove all risk of electrocution or fire due to human error factors. The device cannot protect against electrical shock when current flows through a finger touching both live and negative contacts in a light fixture.

For a free quote for your domestic electrical work call Mark on 1300 727 798.