Q:When we were replacing the accessories within the property we came across red and black conductors at the sockets and red, blue and yellow conductors at the switches. The earth conductors at all the accessories are bare copper without any sleeving. Do we have to install sleeving to all the conductors to the modern standards?

Q: We are carrying out alterations to existing circuits and have come across open connector joints at the rear of the kitchen base units, can we leave them in place?
 
A: No, Live conductors and terminals are required to be provided with an enclosure to ensure there can be no access to those live parts without a means of a key or a tool to prevent the risk of electric shock. There is also a further requirement that the enclosure has to prevent the spread of fire in the case of a fault.