305 on the 2365 electrical cause

[Sandy8]

Has anyone started this module yet

 

[eleanor jones]

wish i had read this earlier , It would have helped so much

 

[Dominik Zajecki]

Hi
Is thiss drawing showing right arrangements for earth fault path for EV unit supplied with 3 phase?

 

[Richard Burns]

The diagram is not too bad but the EVC unit is not supplied with three phase, the installation origin is three phase, the EVC is single phase. The source supply might usefully have multiple additional earths along the cable. There is no indication of earthing for the EVC supply cable, which should be insulated from the EVC unit.
The local earth of the TT should be connected to both the exposed conductive parts and the charging socket. The RCD should be identified as type A or B. The actual earth fault path is not identified. However in general the correct basic principles have been applied.

 

[Dominik Zajecki]

The diagram is not too bad but the EVC unit is not supplied with three phase, the installation origin is three phase, the EVC is single phase. The source supply might usefully have multiple additional earths along the cable. There is no indication of earthing for the EVC supply cable, which should be insulated from the EVC unit.
The local earth of the TT should be connected to both the exposed conductive parts and the charging socket. The RCD should be identified as type A or B. The actual earth fault path is not identified. However in general the correct basic principles have been applied.

Hi
Many thanks for your reply
I have applied correction.

 

[Richard Burns]

Looking a lot better; as a diagram for the earthing arrangement in preparation for identifying the Earth fault path that is OK.
I have made a couple of minor adjustments that may assist.

L3 completed, incoming earth at ELV enclosed, additional PME electrode, relabel TT as local earth.

 

[Edtwozeronine]

Hi
Many thanks for your reply
I have applied correction.

View attachment 47548

Your earth path arrows should be going towards the ground not up towards the earthing terminal.

 

[Edtwozeronine]

The diagram is not too bad but the EVC unit is not supplied with three phase, the installation origin is three phase, the EVC is single phase. The source supply might usefully have multiple additional earths along the cable. There is no indication of earthing for the EVC supply cable, which should be insulated from the EVC unit.
The local earth of the TT should be connected to both the exposed conductive parts and the charging socket. The RCD should be identified as type A or B. The actual earth fault path is not identified. However in general the correct basic principles have been applied.

Interesting to learn this is the way it is in real life, I've completed my course now but I remember the question specified that the EV charging point was supplied by 3 phase, it didn't then say that only L3 would be used to supply it or anything useful like that. If I'd have known at the time, I'd have corrected my diagram. Odd that the lecturer's never mentioned it.

 

[Richard Burns]

Your earth path arrows should be going towards the ground not up towards the earthing terminal.

I do not think an earth path has been drawn in yet. The arrows as far as I can tell are just pointer arrows.

Interesting to learn this is the way it is in real life, I've completed my course now but I remember the question specified that the EV charging point was supplied by 3 phase, it didn't then say that only L3 would be used to supply it or anything useful like that. If I'd have known at the time, I'd have corrected my diagram. Odd that the lecturer's never mentioned it.

Do not assume that this is the answer, I am just assuming that if the car charging point is supplied with three phase then it is a three phase charging point. However I am only going by Dominik Zajecki's post that says this. If the question states that the incoming supply is three phase and it is a single phase car charging point then the first diagram would be more accurate.
What did you draw, single or three phase EVC unit?

 

[Ali khan]

Need some help on q4 design project 2365/615

 

[westward10]

Hello Ali this is an old thread so you maybe better off starting a new thread with more info to your question.

 

[C.Black]

Hi
Is thiss drawing showing right arrangements for earth fault path for EV unit supplied with 3 phase?

View attachment 47544

Is this q 1

 

[Roodini]

Hi I am at present doing question 2 b on the 305 design project on the swimming pool. I don't know whether I need to calculate the number of lights needed for each room or just identify which luminaries I have chosen for each room. I don't know whether I am looking to much into this. Has anyone previously done this question

I take it you mean Q2a? as 2b is about socket outlets etc. It does state that the selection does not need to take into account the suitable levels of illumination or any outdoor lighting. Hope this helps

 

[Edtwozeronine]

I take it you mean Q2a? as 2b is about socket outlets etc. It does state that the selection does not need to take into account the suitable levels of illumination or any outdoor lighting. Hope this helps

It's all about specing out the hotel with accessories but also knowing what amount of protection needed to supply those circuits and showing the distribution boards supplying those circuits. For instance, the hotel rooms you can basically copy the layout of any Travelodge room as they tend to have an electric radiator powered from a switched fused spur just past the end of the desk, in the bathroom they have a heated towel rail also powered from a switched fused spur, 2 double socket outlets that power the TV and kettle and leave the room occupant 2 free socket outlets for whatever use. You will find that above the doorway inside every room is a consumer unit supplying all of these accessories and and the lighting (which may include an extractor fan in the bathroom)

NB: it seems like the assessors want us to show that we are familiar with typical hotel room layouts and can reproduce them on the A3 plans that you get given for the project. Then it's just a matter of creating lots of paperwork showing what distribution boards power what equipment with which type of protection. To keep it simple I called my distribution boards DB1 etc. on the plans then stated their location in the hotel, Floor 1 Room 1 etc. I think I used Excel to produce all paperwork as I kept having to add or delete extra columns and rows in Word and it got on my ----. ?