(Part 1:)
1. Set up of Drawing
1.1. Case Related Comments:
1.2.
1.3.
1.4.
1.5.
1.6.
1.7.
1.8.
Drawing Title to be mentioned.
No space for ADDC stamp.
Type of Project to be mentioned.
Minimum size of the drawing sheet A1 or A0 required.
Scale of the drawing to be mentioned.
Electrical room location and cable entry approval to be shown.
Single Line Diagram, load schedule, lighting layout, power layout, site plan
drawing sheet to be submitted.
1.9. Owner name should be written.
1.10.
Consultant name & stamp should be mentioned.
1.11. Main Contractor name & stamp to be mentioned.
1.12. Electrical Contractor name & stamp to be mentioned.
1.13. Sector & Plot number should be shown.
1.14. Drawing Sheet Number to be marked.
1.15. Legend should be added.
1.16. Legend and layout are not matching.
1.17. All layouts must be clear.
1.18. Electrical layouts must match with approved architectural drawings
1.19. Meter schedule to be provided
V 2.2
(Part 2:).
2. MDB – Ground Floor, Mezzanine Floor or Basement Floor
2.1. Case Related Comments:
2.2. Kitchen or bathrooms are not permitted above electrical room.
2.3. Electrical room shall be with adequate size.
2.4. Main breaker with ELP 300-500mA required.
2.5. MDB to be earthed at 2 points.
2.6. Any water pipe or AC duct passing through electrical room is not acceptable.
2.7. Busbar Riser rating must be same rating as breaker.
2.8. If transformer supply, main breaker is to be ACB ,50KA.
2.9. Location and size of main electrical room to be marked.
2.10. Cable route to be through common area.
2.11. Breaker for generator and bus coupler to be 4 poles.
2.12. ACB to be with drawable type.
2.13. ADDC supply to be checked LV or HV.
2.14. Total connected load to be checked with LDN.
2.15. Cable entry to be provided from section concerned
2.16. Cable routes for the outgoing cables to be shown
2.17. Cap.Bank to be shown
2.18. Bus bar rating of MDB, not mentioned
2.19. Dimension of MDB to accommodate in E/R as per new regulation to be marked.
2.20. Clear common access to reach in E/R required.
2.21. Route of the bus bar to be checked with other services
2.22. IP rating of bus bar to be mentioned
2.23. Number of tap-off points on each bus bar riser not marked
2.24. Rating of tap-off points to match with load and cable size.
2.25. Distribution arrangement of load from bus riser to be shown.
2.26. Length and Voltage drop of bus riser to be given
2.27. Correction to be made in single line diagram
2.28. Kwh meters to be marked on SLD
2.29. All MDBs above 300A rating shall be with 3Ameters, one voltmeter and phase
indicating lamps,
2.30. Adequate rated breaker required on standby generator set
2.31. Route of 630mm cable from transformer to MDB to be approved by concerned
section
2.32. Location of MDB in Basement or Mezzanine floor to be approved by
construction section.
2.33. All tapoff breakers shall be Plug-in-type and current limiting type.
2.34. Cables or bus bar risers are not permitted to pass through generator room.
2.35. All cables running underground must be installed in ducts with ECC in separate
duct.
2.36. Distance and voltage drop calculations must be provided for all cables (in volts)
within limit.
2.37. Circuit breaker rating shall match with load and cable size
2.38. Calculation of load shall be corrected.
V 2.2
2.39. In case of feeding different blocks from one LV panel each block must have its
own MDB and Electrical room.
2.40. Bus coupler (4P) shall be provided between LV panels in the same electrical
room.
2.41. Metering arrangement to be rechecked
2.42. The ratings of KWH meters to be rechecked
V 2.2
(Part 3:)
3. SMDB- Typical Floors
3.1. Case Related Comments
3.2. SMDB placed on bathroom or toilet wall to be shifted.
3.3. Size of SMDB room is inadequate (to fix SMDB, TAPOFF units and KWH
meters).
3.4. Route of the cable or bus riser is not acceptable.
3.5. Tap off point at operateable height required.
3.6. Size of Sub-electrical room to be shown.
3.7. Tap off cable glanding to be from the bottom side.
3.8. Sub E/R required for 200A or above rated sub main panels.
3.9. Flexible cable are not allowed from tap off to SMDB
3.10. Armoured cable should be used from Tap off or from MDB.
3.11. Circuit breaker rating shall match with load and cable size.
3.12. Type of outgoing breaker MCB/MCCB to be shown.
3.13. Incoming and outgoing rupturing current capacity of breakers to be shown.
3.14. ECC with sub main cable to be shown.
3.15. Distribution arrangement of FDB to be shown.
3.16. Number of ways must not exceed 18TP ways .
3.17. Routing of the cable from MDB to SMDB to be shown.
3.18. SMDB to be at centre of typical floor, as far as possible.
3.19. Location of SMDB E/R to be shown.
3.20. Door of Sub E/R to be openable to outside.
3.21. Location of SMDB Lifts shall be in ground floor
V 2.2
(Part 4:)
4. FDB- Inside the shops, offices or flats
4.1. Case Related Comments.
4.2. Rating of MCB’s, RCD and wire size to be rechecked.
4.3. Method of load calculation to be as per RSB requirement.
4.4. Package units with earth leakage protection required.
4.5. Availability of spare breakers required.
4.6. Number of poles of different protection devices to be shown
4.7. Show load on each section.(100mA and 30mA).
4.8. Number of ways of single phase consumer unit not to exceed 12.
4.9. All circuits in the toilet and bathroom to be fed from same phase & 30 mA RCD
4.10. Flexible Cables are not allowed for internal wiring.
4.11. ECC Cable should be provided.
4.12. FDB/SMDB location, should be in an open area easy to reach, not under stair
case, not direct to the sun light, and not on kitchen or toilet wall
4.13. If feeding from MDB supplied from transformer, must be MCCB type with min
25KA.(Isc)
4.14. Two Split bus bar 1 section 100mA RCD & 2nd section 30m A RCD required.
4.15. Breaker rating for lighting 6-15A for radial circuit 20A, for rings sockets 30A
and for water heater window AC and other power points 20A, cooker 30A, to be
used.
4.16. Size of main feeding cable not shown,
4.17. Number of ways must not exceed 14 ways TP.
4.18. 3 phase load to be balanced and same phase to be used in one place
4.19. Number of connected points of each circuit to be matching with breaker rating
and wire size.
4.20. Sign Board point to be shown for the shops.
4.21. Diversified load to be shown for each circuit in the FDB- load schedule.
4.22. Under floor trunking shall be purpose made metallic trunking.
4.23. Water Heater is not shown in the flats. Clarification required.
4.24. Minimum number of sockets and connection points must be as per RSB
regulations
4.25. Layouts must match with load schedules
4.26. 15A sockets should not be installed in domestic type of load
4.27. Load schedules to be corrected
4.28. All machines to be protected with earth leakage circuit breaker
4.29. All machines to be connected to ring earth
V 2.2
(Part 5:)
5. A/C Panels & Roof Installation
5.1. Case related comments
5.2. For 3 phase AC unit TP isolator and 100 mA ELCB to be provided.
5.3. Chiller catalogue must be provided to check connected load and breaker rating.
5.4. Size of cable or wire is inadequate for the actual AC load.
5.5. Isolators on roof to be weatherproof
5.6. The size and location of MCC room not adequate
5.7. Cable tray between MCC panel and the AC unit to be shown
5.8. Capacitor bank to be provided with MCC panel in the same room
5.9. Any distribution board/MCC inside pump room/mechanical room is not
permitted
5.10. Bus bar route must not be through pump room
5.11. Mechanical room size to be checked
5.12. Cable routes for the incomer and outgoing of panel to be shown
5.13. Chillers isolators to be provided
5.14. Starter of chilled water pump to be shown on the drawings
5.15. AHU machines, , which is more than 5.5 HP, should be provided with current
limiting type starter. Erath leakage protection must be provided.
5.16. Water pipes not allowed to cross the MCC room
5.17. If AC provided in mechanical room should be provided (ACH) in MCC-panel
5.18. Slab opening for chiller cables to top roof shall be on side walls instead of on
ceiling
5.19. Cap. Bank to be in separate cubicle
5.20. Bus bar riser route is not permitted through open to sky
5.21. Kitchen and toilets extract fans to be shown on drawings
5.22. TPN+E Sockets for cleaning cradle shall not be looped together.
5.23. Chillers to be fed directly from AC panel located in the roof instead of from
MDB.
V 2.2