cables in dry riser shaft

I recall a prohibition on other cables in lift shafts, but don't recall anything specific about not using dry riser shafts.

There may be fire protection considerations - but I suspect that'll demand more in the way of preserving fire barriers and avoiding creating chimney effects (e.g. appropriate sealing of holes made for cables) rater than a flat prohibition.How does the shaft finish at the top? is it open (e.g. generally or into some building void) or reasonably well sealed off?

   - Andy.

Not exactly catching the situation you describe. Usually dry or wet risers are in firefighting shafts or protected stairs. If I get you correctly, this is a multi story building with the dry riser in a cupboard in the protected stairs or fire fighting shaft? That cupboard has been pirated by parties who have used it as an electrical services riser. The dry riser is a facility for firefighters, who may use the landing on which the dry riser is located as a bridgehead to fight a fire on that storey level or above, or in some cases, below. That being the case, the cupboard door needs to be open to access the valve. The last thing firefighters need is a passage for smoke to spill into the bridgehead landing via the cable routes, enclosed or otherwise.

A call to the local fire chief is likely to result in a direction to remove the offending cables altogether. 

It's in a small shaft up to first floor then in cupboards inside the building with fire doors,all cables entry's and exits appear sealed.

Assuming that the grey galvanized pipe is the dry riser  for water in the event of fire ?  And then that the wiring, keypad and black gas (?) pipe have been added later.

Its certainly pretty rough, and the PVC trunking is an odd choice in a fire critical part. I'd have expected it not to be sharing, or if it had to be then in steel containment tight to the corner.

It may be worth considering which bits of the building are intended not to be on fire when others are ;-) I suspect the original intention has been compromised.

M.