Lessons Learnt Part 3

March 2016Drawings and Design Issues

Introduction• Whilst reviewing the list of lessons learnt, a

number of points were raised to design and drawings issues.

• Here is a list of them , I ask you all to go through them, understand them and find a method of remembering them when we do something similar again.

Method of installation above soffitAlthough PVC/PVC cables was used (clipped direct),

client complained about this method Make which ever installation methods we intend to

use clear to the client in offer and on drawings too

Cable scheduleCable schedule not completed during execution

It is important to have a cable schedule that contains all info in one excel sheet so that the installer can filter and print according to his requirements.

CablingInaccessible Joint and junction boxesJoints and Joint boxes are to be made in a place

where they will be accessible. If not possible than no joints should be made

Panel locationsInstallation of DAC boxes/EnclosuresPanels are to be installed on the secure side but they

are also to be located in a reachable area which is accessible.

Open Shafts should be avoided to eliminate water ingress issues.

NetworkIP DesignPatch panel ports and switch ports should be

provided and shown on site.

Panel Drawings and Design DAC enclosure designWe need to find some time to discuss how the DAC

Panel can be more organised. A lot has been done and a lot more can be done in

the future.

PIRsLocations of PIRsDo take note of installation height and or

installation environment. (any obstacles, direct sunlight and heat sources need to be avoided)

Try to use omnidirectional PIR brackets.

HDMI CablesHDMI cable Lengths.Do not use HDMI Cable above 10Meters

Cabling on VSDSUse of single core cabling on Variable Speed drivesWhen wiring a Motor/Pump to a VSD, please use

armoured cable or 2 core double insulated cable. Please do not use any single core cables- this will create harmonics and effects the Modbus signal."