ELECTRICAL SERVICES DESIGN PROCEDURE

ELECTRICAL SERVICES DESIGN

ELECTRICAL SERVICES DESIGN PROCEDURE

IN THIS SECTION, WE ARE GOING TO LOOK AT THE ELECTRICAL SERVICES DESIGN OF A BULDING COMPLEX.

WE WILL REQUIRE AND WORK WITH AND ALSO WORK ON THE FOLLOWING:

-          PLAN

-          ELEVATION

-          ARCHETECTURAL DRAWINGS

-          RELEVANT SECTIONS SHOWING SOME DETAILS WHICH MAY BE RELEVANT AND NECESSARY FOR OUR WORK. THESE DETAILS MAY BE HIDDEN.

-          STRUCTURAL DRAWINGS

-          ANY RELEVANT INPUT FROM THE CLIENT WITH RESPECT TO THINGS THAT SHOULD BE PROVIDED FOR ENHANCED FUNCTIONALITY.

-          SCHEMATIC DIAGRAM SHOWING POWER POINTS AND ILLUMINATION DESIGN WITH LEGEND.

-          SCHEMATIC DIAGRAM SHOWING PROTECTION AND CONTROL.

-          LOAD ANALYSIS

-          LOAD SCHEDULE (SHOWING CIRCUITS  AND LOADINGS IN AMPERES (FINAL  SUB-CIRCUIT DETAILS AND  NUMBERING OF FITTINGS AND LUMINARES AND OTHER ITEMS IN ANY CIRCUIT AS WELL AS THE PROTECTION STECIFICATIONS (FUSE OR CIRCUIT BREAKER RATING) )

-          LOAD BALANCING (ESPECIALLY FOR THREE PHASE DB.)

-          BILL OF QUANTITIES.

-          TESTS AND EXPECTED TEST RESULTS AND USE AND APPLICATION AND INTERPRETATION OF THESE RESULTS

-          REMIDIAL ACTION FOR UNACCEPTABLE TEST RESULTS

-          ROLE OF THE MINISTRY OF MINES AND POWER IN TESTING AND CERTIFYING ELECTRICALL INSTALLATONS AS BEING READY AND SAFE  FOR USE, HAVING MET THE MINIMUM STANDARD AS STIPULATED BY RELEVANT REGULATING BODIES ESPECIALLY FOR SAFETY

-          IMPORTANT TESTS SUCH AS PRESSURE TEST, INSULATION TEST, DETERMINATION OF FLASHOVER POINT, INSULATION COORDINATION, CONTINUITY TEST, EARTH LEACKAGE TEST, POLARITY TEST,

-          CABLES, TYPES, SIZES, SPECIFICATIONS, INSULATION, MECHANICAL PROTECTION, SPECIAL USES SUCH AS FIRE RESISTANT (H.O.F.R.C), MINERAL INSULATED CABLES (MICC), BUNDLED CABLES, ARMOURED CABLES, FLEX,ETC.

-          EARTHING

-          BONDING

-          COMMUNICATION (INTERCOM), ETC.

-          FIRE ALARM SYSTEM

-          COMPUTER NETWORK FACILITIES.

-          DEFECT LIABILITY PERIOD

-          CERTIFICATES

-          INSPECTION

-          COMMISSIONING

-          SCALE OF FEES

-           

BILL OF QUANTITIES:

PHYLOSOPHY:

SUPPLY

CONTROL (PROTECT)

CONNECT UP.

S/N	ITEM	DESCRIPTION	QUANTITY	RATE	AMOUNT

USE LOT WHERE AND WHEN THE NUMBER OR QUANTITY CAN NOT BE COUNTED EASILY.

SPECIFICATIONS.

SWA  STEEL WIRE ARMOURING

PVC/PVC CABLE

1.mm² Ф

COPPER  Cu

ALUMINIUM  Al

TYPE, MAKE, SIZE

OTHER DETAILS

QUANTITY

LOT

SERIAL NUMBER S/N

ITEM

DESCRIPTION

RATE

AMOUNT  AMT

QUANTITY  QTY

QUANTITY COULD BE LOT WHERE MEASUREMENT AND COUNTING IS DIFFICULT

CABLE TYPE: HEAT OIL FIRE RESISTANT CABLE (H.O.F.R)

MICC  MINERAL INSULATED CABLE

-          SPECIFY EXPECTED TEST AND TEST RESULTS BEFORE CERTIFICATION  (BEFORE CERTIFICATES ARE ISSUED IE. CERTIFICATE OF COMPLETION)

-          TESTS SHOULD BE CARRIED OUT AND CERTIFIED BY MINISTRY OF MINES AND POWER

EG:

·         PRESSURE TEST

·         INSULATION TEST

·         IMPULSE TEST

·         FLASHOVER POINT

·         BREAKDOWN VOLTAGE

·         CONTINUITY TEST

·         EARTH LEAKAGE TEST

·         POLARITY TEST

·         ETC

-          LOAD ANALYSIS

-          LOAD SCHEDULE – SHOWS VARIOUS CIRCUITS

-          DEFECT LIABILITY PERIOD

-           

S/N	ITEM	DESCRIPTION	QUANTITY	RATE	AMOUNT

S/N : NUMBERING FOR EASY IDENTIFICATION OF ENTRIES IN THE BILL OF QUANTITIES. EG. 1, 1.1, 2.1.1, ETC.

ITEM: ITEMIZATION OF SERVICES DESIGN ELEMENTS WHICH FORM PART OF THE BILL OF QUANTITIES.

DESCRIPTION: DETAILED DESCRIPTION OF THE VARIOUS ITEMS IN THE BILL INCLUDING DETAILED SPECIFICATIONS . EG DB DISTRIBUTION BOARD; MAKE, RATING, NUMBER OF WAYS, NUMBER OF PHASES, ETC. CABLES, SIZES,INSULATION, SPECIAL FEATURES EG. STEEL WIRED ARMOURING, PVC/PVC CABLES, 1mm² ETC. H.O.F.R CABLES. ETC