Because I don't like you or your type i.e. fast track idiots who know absolutely nothing.
Boilers usually create a current to earth during ignition. Other domestic equipment also creates some leakage. For that reason many prefer to fit them to a non RCD circuit.
No boilers do not create
earth leakage problems, thats the technical term by the way. I wouldn't expect you to know that as you are neither aproppriately qualified or experienced.
Fridges and freezers do when the compressors start to age and may cause sensitive RCD's to trip.
The OP said it was outside, I interpreted that to be in an outhouse or leanto. If its a stand alone external boiler then I agree the regs indicate it should be on an RCD circuit as external equipment.
Well if you were TIMESERVED and experienced in all aspects of the plumbing and heating trade, you would know that oil boiler manufacturers have external models and the OP has stated
combi/external.
If it is in an outhouse it is NOT external as it is still within the equipotential zone of the building.
Are you following this or am I loosing you grandad?
Whilst you might connect freezers on a seperate RCD circuit, I have never seen any connected that way.
What one RCD just for a freezer, you mean RCBO...there is a difference
You have never seen any that way because you are a short course gas idiot and have never served your time and only repair cr4ppy boilers.
When you train properly i.e. apprenticeship, you see many different situations during your time, YOU and many like you do not have this EXPERIENCE! this is why apprenticeships are the only way to qualify properly.
The OP in this case has fuses! No MCBs or RCDs just fuses and a boiler connected to the light circuit even though it may be externally mounted.
Firstly bawbag! the OP may have an MCb as I have stated 'BS3871' pop out MCB's for straight replacement of rewireable BS3036 fuses.
The clue was when the op said 5AMP, both the above protective devices are 5AMP, see experience and appropriate training tells you this of which, YOU HAVE NEITHER.
Thats a long way from the current regulations but still typical of perhaps 10% of UK installations. I know an old lady with a 1936 installation with white ceramic fuses and surface mounted wiring. She and her daughter, both pensioners, say they dont have money to rewire their £500,000 house. Her son , a one legged dentist, could pay for it with one weeks earnings.
The wiring regulations are not retrospective and in that I mean, you do not have to update your fixed wiring when the regs change.
However, if you add or modify an existing cct i.e. fit a new shower or fit a new boiler spurred of the ring main, then that cct or part of needs to comply with the CURRENT REGULATIONS.
So! unless the OP's boiler was fitted pre 1991 first edition of the 16th edition wiring regulations, the work does
NOT comply.
Then again you would probably argue about the 1st edition of the wiring regualtions dating from 1882 as you are an old fool, judging by your gas safe photo
You have also failed to notice that the boiler is fitted to a 5amp lighting cct when the boiler itself requires 5AMP protection
FFS IDIOT
I wonder how many installs old tony's done that don't comply, HOW THE MIGHTY 'so called mind you' FALL.
I await more of your diatribe old man, trying to riggle AGAIN out of something you have made an a4se of yourself in.
If you need to know anything about plumbing, heating, electricals, renewables, oil, gas or LPG old man just ask.....I'll put you right!
I wonder if old tony will admit he's wrong or just hide or better still bleat to admin and have the thread removed?