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Selectivity as a topic doesn't seem to be in the course material (not mentioned even once) which is why the question confused me a bit. Fully understand now though and passed the exam with a 100% score! :cool: Oddly, the term descrimination is mentioned in a section about RCBO's, saying that...

Thats the Science exam done. 95%. That'll do me. Still bugging me not being able to find out the two questions I got wrong though!

The College decided it would a good idea to do the C&G 2365 level II Electrical Installation Technology exam today and the Electrical Science exam tomorrow! :confused: So busy cramming formulas tonight! F=BIl, e=Blv, F=ma electrons, protons, left hand rule, class 3 levers, R=Rho.l/a blah blah...

OK, so if the MCB and fuse are rated such that both open together when the fault occurs at the appliance, the whole circuit goes off. Answers b: loss of all (power to) equipment on the circuit.

Not entirely sure what they are getting at with this question: A circuit has been poorly desgined for selectivity between an appliance fuse and a MCB protecting the entire final circuit. What is the most likely outcome should a single fault occur on the appliance? a: A fault would disconnect...

Yes, I hope the real exam has questions that are taken from the actual course material and on-site guide rather than just made up on the fly! The tutor is actually pretty old school and as I'm a lot older than the rest of the students, perhaps he wasn't prepared for a discussion on the finer...

No its at college. I queried it with the tutor and didn't get any reasonable reply, other than that his opinion of the questions was just as poor as mine! In this case it was a mock exam, the real one is due after Easter and we don't get to see the right and wrong answers in the real exams.

No, it's no different than solar thermal. It moves heat energy from one place to another and both require an additional electric power source to operate. If I really wanted to knit pick I'd say a 'generator' converts one type of energy to another... maybe? But the question is, in the list of...

Yes but the question is, is an ASHP considered micro-generation? I say it is due to it extracting energy from the air and doing it at at least 3X efficiency. Solar thermal also requires additional power to operate so it falls into the same camp. Solar PV works without any other power input as...

Ahhh! Good point! But doesn't an ASHP pull energy out of the environment just like wind, solar and other renewables. After all it generates 3x more heat than the electrical energy in consumes, so it's a net generator. All of the mentioned systems are in the section of the course notes called...

One more and I think this is a really dumb question: Which of the following micro-generation systems required LEAST maintenance once installed? a) Biomass b) Solar thermal c) ASHP d) Micro CHP Clearly a) and d) are going to be higher maintenance. ASHP and Solar thermal? Hmmm. I'd say even...

Sadly we won't have the Regs book to hand in the exam, only the on site guide. Looking at the charts I see that 300A is just at the point on the 32A line where the magnetic trip meets the thermo trip on a class C and is nowhere near the line on a 32A Class B. Am I right in reading that charts...

I think the term water-tight is a bit stupid, sealed against moisture might have been better. I mean you can have something thats water tight but lets in water vapour...

This is another test question. Mulitple choice. Which circuit breaker operates fastest with a 300A fault current. 1. 32A Type B 2. 32A Type C 3. 32A type D 4. 32A Type C RCBO. I am thinking, as it's not been in any of the handouts, that a type B would see 300A as a short circuit and operate...

Looking at some example questions, I'm not seeing any answers in the handouts for unit 203, Electrical Installation Technology. First is: The Insulation material in MICC is absorbent, therefore the terminations must be: a) watertight b) correctly identified c) fitted with a gland d) fitted...

Are there any benefits of going for, say an 8kw inverter over a 5kw, with a solar PV and battery system? I assume a 5kw would pull additional power from the grid if demand exceeds 5kw, rather than just switching 100% to grid supply? I'd also assume that an 8kw inverter will be less stressed...

Maybe the energy crisis gold rush is over!

I'll do a search on SEPLOS and see what comes up on here... "DIY Battery is alive" and "another DIY battery is alive" seem to be the main threads...

Well I've got an HNC in Electronic Engineering and I've just started College (as a very mature student :D) to do my City&Guilds Electrical Installation level 2. I've read and watched a load of stuff about the in's and out's of batteries so I think I'd be OK with the kit, especially as SEPLOS...

Great post Oldman22, gives me some confidence buying my batteries from Fogstar. Just got to decide if I want their ready built unit or a SEPLOS kit... £2k for the 15kWh SEPLOS vs £4k for the Fogstar 15kWh rack.