what does a RCDBO do

• protects fault to earth

• protects from overload

• protects from short circuit

• all of the above

what does RCDBO in electrical terms mean

• residual current breaker with over-current

• residual voltage breaker with overload

• residual capacitance breaker with over- current

• residual carrots breaker with over-current

why is it necessary to have RCDBO's installed for final sub circuit's

• cos you can charge more money

• as part of compliance it is necessary to protect cabling, live stock and humans from faults

• its not necessary

• only necessary if the client asks for one

what happens with the RCDBO if you have intermix on the neutral sub circuit's

• wont be able to turn on as it will keep on tripping the device

• nothing its fine

• as long as the active is intermixed it will operate

• hope for the best close your eyes

what are the correct connections

• active to active

  neutral to neutral

  earth to earth

• doesn't matter as long as the wires go somewhere

• active to active

  neutral to earth

• earth to earth

  active to neutral

what does MEN stand for

• multiple earth neutral

• male

• multiple earth network

• multiple earth node

what is the purpose for the test button on the RCDBO

• the manufactures though is was a good idea

• to test the operation of the device and making sure it is operational

• tests all the circuits to make your life easy

• doesn't have much or a purpose but fun to press

how often is the recommendation to test the operation of the RCDBO device

• weekly

• monthly

• yearly

• every six months

does the current rating of t he RCDBO matter when installing on a final sub circuit

• no

• yes the rating should be less than the maximum current capacity of the conductors taking in mind of derating factors and voltage drop

• sometimes

• only if its specified to do so

how many RCDBO's should you connect to a final sub circuit

• as many as you like

• one

• two

• three