Electrical Problem

[Hobsoni]

Hello Everyone,

Please find attached a little test of logic.

One of our Engineers sent it my way and i'll be honest with you.............i'm yet to meet anyone (except the engineer) who can solve the problem correctly.

I will be impressed with anyone who finds the solution.

Best of luck

 

[Silly Sausage]

Sw1/1 - Lamp 1 - Sw2/1
Sw1/2 - Lamp 2 - Sw2/2
Sw1/3 - Lamp 3 - Sw2/3

Sw1/4 - Sw1 1,2,3
Sw2/4 - Sw2 1,2,3

 

[Hobsoni]

if i am interpreting your answer correctly, i think u will find that all lights will be illuminated when not in position 4 also.

This is not correct.

unless you wish to advise me otherwise.

 

[Silly Sausage]

WRONG - I know!
Far too hasty on my part, have to think about this one...

 

[AP Electrical]

As above

Sw1/1 - Lamp 1 - Sw2/1
Sw1/2 - Lamp 2 - Sw2/2
Sw1/3 - Lamp 3 - Sw2/3

then sw2/4 to sw2/1,2,3

 

[AP Electrical]

know its wrong but sure im on right line

 

[Hobsoni]

As above

Sw1/1 - Lamp 1 - Sw2/1
Sw1/2 - Lamp 2 - Sw2/2
Sw1/3 - Lamp 3 - Sw2/3

then sw2/4 to sw2/1,2,3

Look again a little closer, you will find that all lights are illuminated when the switches are not in position 4 also.

Keep going though.

 

[telectrix]

bloody hammer. all ligths off. problem solved, time for bed.

 

[colshaws]

Buy the guy a torch

 

[sedgy34]

Buy the guy a torch

and some intermediates

 

[oldtimer]

The only way to do it would be to have switch 4 energising a 3 pole relay that switches all 3 lamps on seperatly

 

[Marvo]

My head was hurting before I looked at the pdf, it's hurting worse now.

Can you have one switch with a neutral on the common connection and the other switch with a live on the common or is that against the rules (or regs)?

 

[Spazz]

What about using SW1/4 and SW2/4 connected to a wire (wrapped around the other wires) to cause induced current - dont think it would light up the lamps enough though - the only way I can think about doing this would be using Diodes (DC) or relays as said above

 

[AP Electrical]

Hobsoni, you have ruined my evening, now im of to bed to keep thinking about it, I refuse to be beaten............:32:

 

[simpson93]

is it actually possible? my head is hurting now anyway