Baseboard height

[first timer]

Nobby, what do you mean by pluggable choc blocks, some of the wiring will have to be pulled from the back of the layout to the front ready to be connected to the controllers. I will only need 2 conections to start with but they both at the back so whats the best way of bringing them to the front.

Les

[dannyboy]

This type of connector -
http://www.ebay.co.uk/itm/PLUG-IN-STRIP-TERMINALS-CONNECT-BLOCK-6AMP-10AMP-WIRE-ELECTRICAL-CABLE-WIRING-/252363195944?var=&hash=item3ac204c628
Plenty of other suppliers (and prices) available.

[Newportnobby]

Les - this is the sort of stuff I was referring to. Looks like normal choc block but 'splits'.
This would allow placing/removal of a lift out section across the shed door but I would want something more permanent if I was just bringing a wire from the back of the layout to the front (maybe normal choc block)
The good thing about the pluggable stuff is it can be used to feed wires into a mimic panel or be used wherever disconnection is needed - like a lift out section.

https://www.rapidonline.com/Hylec-HYPS-01712-Plug-and-Socket-Terminal-Strip-pair-6A-21-4278?IncVat=1&pdg=kwd-339568221095:cmp-757438067:adg-44804851896:crv-207912323492:pid-21-4278&gclid=EAIaIQobChMItOK96YiQ1gIVzZPtCh2rHQJ6EAQYAiABEgKqNfD_BwE

Shop around for cheapest prices!

Edit - Oops. Crossed with dannyboy

[first timer]

I see what you mean now Nobby, I surpose you connect the wires and just stick the wire under the board with tape to hold it up and keep it tidy !!!!!!!!

[first timer]

Is 6amp too much or should I go for 3amp?

[The Q]

3 amp will be plenty because that's 3 amp 230V or roughly 700Watts, if you pull 3 Amperes (which I doubt ) it will be at less than 20Volts or roughly  60Watts..

Yes there are differences between AC and DC power through wires and connectors but 3A will be more than enough for an N gauge layout.

Tape beneath layouts won't generally hold, either use proper cable clips https://www.amazon.co.uk/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-keywords=canle+clips 
or possibly a hot melt glue gun(if you are working the right way up!!!.)
or another possibility is stick on cable clips they will normally hold https://www.amazon.co.uk/s/?ie=UTF8&keywords=stick+on+cable+clip&tag=mh0a9-21&index=aps&hvadid=8861389213&hvqmt=e&hvbmt=be&hvdev=c&ref=pd_sl_56ocowkfr2_e

[dannyboy]

There are numerous ways of holding wires to the underneath of baseboards. I like to use 'P' clips, like these -

http://www.ebay.co.uk/itm/High-Quality-Assorted-Box-of-Black-Nylon-Plastic-P-Clips-200-Pieces/142251013738?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

BUT, you have to get under the board to screw them in!