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14

Two metals are currently used as conductors in electric panel boards: copper and aluminumIn particular, when in need to define a power distribution inside an electric panel board, one mainly chooses to use drawn bars, using both the above-mentioned metals.In configuring a bar distribution system, one must consider some parameters, both electrical and mechanical, such as, for example:

electrical parameters: rated intensity value to carry based on the conductor cross-section and number, and the resulting voltage loss. mechanical parameters: bar size and number, based on panel board dimensions and on their mechanical resistance. Other factors to consider,

which might limit the passage of current through the selected conductors, are linked to the working temperature of theconductor and to its capability to dissipate heat.

In electricity, there is also a phenomenon called "skin effect" which determines the concentration of current on the conductors surface. The bestconductor is therefore a flat one, such as drawn bars, in which the bar length and thickness ratio is the highest possible.E.g. for the same cross-section in sq. mm and working temperature, a 100x5 mm bar carries 1.431 Ampere, whereas the same cross-section,with a 50 x 10 mm bar carries 1.129 Amp (cf. ampacity values on page 16, table for solid copper bars, referred to a ΔT 50°C).

ADVANTAGESPrepunched and threaded copper bars Solid aluminum barsready to use For the same cross-section with copper bar, a significant weight saving,no need of punching tools up to 70% less, with an ampacity reduction of about 30%.wiring time savings Significant economic advantage due to the different cost of the raw

material and, especially, the great difference in the weight/volume ratio.

TECHNICAL FEATURESCopper bars Aluminum barsElectrolytic copper Cu-ETP 99.90% Aluminum type EN-AW 1350 ARounded corners Rounded cornerstensile strength: 250 N / sq.mm tensile strength: 80 N/sq.mmresistivity: 0,0172 Ω / mm² x meter resistivity: 0.0286 Ω / mm² x meterdensity: 8.9 kg/cu.dm density: 2.7 kg/cu.dm

Copper and Aluminum busbars

15

Busb

arsReference Code Weight

Kg L S P

PREPUNCHED COPPER BARSThickness 5 - 10 mmLength 1750 mm

SOLID COPPER BARSThickness 5 - 10 mmLength about 4200 mm

SOLID ALUMINUM BARSThickness 10 mmLength 4000 mm

181818182525252518251825251825

2345554545555510

M Ø

M5M5M5M5M6M6M6M6M5M6M6M6M6M6M8

121212121520253212151520303230

0.220.320.420.490.640.840.801.350.841.181.161.662.492.652.49

10101010444410444444

BRF 12X2X1000BRF 12X3X1000BRF 12X4X1000BRF 12X5X1000BRF 15X5X1000BRF 20X5X1000BRF 25X4X1000BRF 32X5X1000BRF 12X4X2000BRF 15X5X2000

BRF 15X5X2000 PCBRF 20X5X2000BRF 30X5X2000

BRF 32x5x2000 WBRF 30X10X1000

BRF0990BRF0995BRF1000BRF1005BRF1010BRF1015BRF1016BRF1020BRF1025BRF1030BRF1031BRF1035BRF1040BRF1041BRF1045

Reference Code WeightKg L S P

2525252525252525252525

5555551010101010

D Ø B

12.512.512.512.512.512.512.512.512.512.512.5

10.510.510.510.510.510.510.510.510.510.510.5

25506380100125506080100120

1.393.394.395.697.249.196.708.7911.3014.4018.30

22222222222

BRP 25X5BRP 50X5BRP 63X5BRP 80X5BRP 100X5BRP 125X5BRP 50X10BRP 60X10BRP 80X10BRP 100X10BRP 120X10

BRP1000BRP1005BRP1010BRP1015BRP1020BRP1025BRP1030BRP1035BRP1040BRP1045BRP1050

Reference Code WeightKg L S

4555555555101010101010101010

12202530405060801001253040506080100120160200

0.430.891.111.331.782.232.673.564.455.562.673.564.455.347.128.9010.7014.2517.80

1111111111111111111

PRP 12X4PRP 20x5PRP 25x5PRP 30x5PRP 40x5PRP 50x5PRP 60x5PRP 80x5PRP 100x5PRP 125x5PRP 30x10PRP 40x10PRP 50x10PRP 60x10PRP 80x10PRP 100x10PRP 120x10PRP 160x10PRP 200x10

PRP0990PRP1000PRP1005PRP1010PRP1015PRP1020PRP1025PRP1030PRP1035PRP1040PRP1045PRP1050PRP1055PRP1060PRP1065PRP1070PRP1075PRP1080PRP1085

Reference Code WeightKg/mt L S

1010101010101010

203040506080100120

0.540.811.081.351.622.162.703.24

11111111

BAP 20x10x4000 BAP 30x10x4000 BAP 40x10x4000 BAP 50x10x4000 BAP 60x10x4000 BAP 80x10x4000 BAP 100x10x4000 BAP 120x10x4000

BAP4000BAP4005BAP4010BAP4015BAP4020BAP4025BAP4030BAP4035

THREADED COPPER BARSThickness 2 - 3 - 4 - 5 - 10 mmLength 1000 and 2000 mm

Copper and Aluminum busbars

Cross-section

mm²Dimensions ΔT

50°CΔT

30°C

143160212241289363380502530756

108120160183218274288379400573

2436486075100100150160300

12 x 2 12 x 312 x 412 x 515 x 5 20 x 5 25 x 430 x 5 32 x 5 30 x 10

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Copper and Aluminum busbars - Ampacities table

Ampacity table Copper bar based on the ΔT temperature increase as per standard DIN 43671Reference room temperature 35°C

Ampacity table Aluminum bar based on the ΔT temperature increase as per standard DIN 43670Reference room temperature 35°C

Example of bar choicefor In = 800 A

for Tmax = 85°C

with copper prepunched bar63 x 5 In = 951 Amp

with solid copper bar63 x 5 In = 951 Amp40 x 10 In = 944 Amp

with solid aluminum bar50 x 10 In = 874 Amp

cf. tables withΔ T = 50 °Cwhere:Tmax = max. considered working

temperatureTa = reference room temperatureΔ T = temperature increase in °CTmax = 50°+ 35° = 85 °C

THREADED COPPER BARS

Cross-section

mm²Dimensions

Number of bars in parallelΔT 30°C ΔT 50°C

89014111673196022962666

7951260149417502050238018972139259530323478

586940119714501730202214041600196223062660

10531669198023192716315325142834343840174609

7761317158619212292267918612119260030563524

117918702217259730423532

43377295111731431172210501214152818362144

32758371888510801300792916115313861618

12525031540050062550060080010001200

25X550X563X580X5100X5125X550X1060X1080X10100X10120X10

PREPUNCHED COPPER BARS

Cross-section

mm²Dimensions Kg/mt

4515146357728901003104312201411161316731960229626661151154719312448276031243651418829423564

4034605676907958969311090126014401494175020502381959128916092040230027903260374046805610

2923344055005866724948369941150119714501730202273498612301510172021102480286035904310

534607751914105311871234144416701908198023192716315512691701212427033048369743204956

3874405376637768909201108131715241586192122922679970130016242001227927963286379062017433

5986798411023117913291382161718702137221725973042353215222041254932433658414048385550

2122412893634335025306397729129511173143117235647569441129130516431974230647575711

1601832182743273794004825836887188851080130042757371585298512401490174022202690

0.430.530.670.891.111.331.421.782.232.672.803.564.455.561.782.673.564.455.347.128.9010.7014.2517.80

4860751001251501602002503003154005006252003004005006008001000120016002000

12 x 412 x 515 x 520 x 525 x 530 x 532 x 540 x 550 x 560 x 563 x 580 x 5100 x 5125 x 520 x 1030 x 1040 x 1050 x 1060 x 1080 x 10100 x 10120 x 10160 x 10200 x 10

SOLID COPPER BARS Number of bars in parallelΔT 30°C ΔT 50°C

Cross-section

mm²Dimensions Kg/mt

0.540.811.081.351.622.162.73.24

20030040050060080010001200

20 x 1030 x 1040 x 1050 x 1060 x 1080 x 10100 x 10120 x 10

SOLID ALUMINUM BARS Number of bars in parallelΔT 30°C ΔT 50°C

33144555766777498311901390

643832103012101390172020502360

9421200146017101940238027903200

4345837308741006127815471807

8421090134915851807223626653068

12341572191322402522309436274160

17

Busb

arsBrass distribution block for 5- and 10-mm thick copper bars.

Made of:1) no-punching connection unit on solid copper bar 2) 8-output distribution block unit 2.5 to 25 sq.mm cable sect. (direct connection on

25-mm pitch prepunched bars) made of brass with hexagonal tightening screws

ADVANTAGESThe connection unit can be used as a guide to make punching the 5- and 10-mm thick barseasier.Spacing two or three prepunched bars becomes simple using the connection unit as a guide.Simple and quick derivations with cables up to 16 and/or 25 sq.mm (terminal lug) which can beused up to 400 A.

Use with solid bar:Use both the units; no punching needed to fit the connection unit directly on the bar side.

Use with prepunched bar:Use only the distribution block unit on single bar phase systems. Use both units on multi bar phase systems.

ReferenceCode WeightKg A B C

12.5-C13752

303030

D Nm

1010

-510

505050

0.220.390.51

121212

BOC RIP 8 *BOC KIT 8 - 5 **BOC KIT 8 - 10 **

BOC1000BOC1005BOC1010

Outputs Code Cable sect. withferrule mm² Nr. outputsStripped cable

sect. mm²

44

Nm

33.5

2.5 ÷ 164 ÷ 25

2.5 ÷ 254 ÷ 35

← OUT← OUT

BOC1000

* BOC RIP 8 8-output distribution block unit** BOC KIT 8 - 5 8-output distribution block unit + connection unit on 5-mm thick bar** BOC KIT 8 - 10 8-output distribution block unit + connection unit on 10-mm thick bar

BOC - Direct hook-up distribution block on copper busbars

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Connectors for busbars

TECHNICAL FEATURES

TerminalsPassivated galvanized steelConnections on copper bars 5 and 10 mm thickUsed cable cross-sections: from 1.5 to 120 sq.mmScrewdriver head for sect. 16 and 35 sq.mm

Busbar clampsElectrolytic galvanized steelMax. tightening thickness 20 mm (with supplied screws)Plate thickness 5 mm

For connections between Copper and Aluminum

Terminals for cableThese allow direct connection of a flexible cable, previously stripped , up to the 120 sq.mm cross-section on 5- and 10-mm thick solid copper barswithout having to punch them and to use the relevant lug on the cable. The stripped cable is fitted and tightened on the bar by a metal plate, thuspreventing the wires to break. Easy and quick to use, they allow interventions on already fitted bar systems without having to dismantle them toperform the relevant punching.Compliant with standard EN 60998-1:2004 European directive 2006/95/EC Low Voltage equipment Directive RoHS.

Busbar clamps for solid and flexible barsThese allow direct connection, without punching and bolting, between rigid copper bar systems or with insulated flexible bars. Easy and quick to use,they allow interventions on already fitted bar systems without having to dismantle them to perform the relevant punching.

ReferenceCode Hmm

Lmm

Smm

Cable cross-section mm²

1,5 ÷ 1616 ÷ 3535 ÷ 7070 ÷ 120

1,5 ÷ 1616 ÷ 3535 ÷ 7070 ÷ 120

12162124

12162124

Nm

36 ÷ 8

10 ÷ 1212 ÷ 15

36 ÷ 8

10 ÷ 1212 ÷ 15

22293134

22293134

26313944

31374348

for 12x4 and 12x5 mm threaded bars

10101010

10101010

100

MCR 5x16MCR 5x35MCR 5x70MCR 5x120

MCR 10x16MCR 10x35MCR 10x70MCR 10x120

MCR 4xM5

MCR1000MCR1005MCR1010MCR1015

MCR1020MCR1025MCR1030MCR1035

MCR1100

Terminals for 5-mm thick bars

Terminals for 10-mm thick bars

Spider connector for threaded bars

ReferenceCode Emm

Cmm

Amm

Bmm

51596751597753637790115135

77777710710710753637790115135

Ø / Dmm Nm

1 ÷ 21 ÷ 21 ÷ 21 ÷ 21 ÷ 21 ÷ 21 ÷ 21 ÷ 21 ÷ 21 ÷ 21 ÷ 21 ÷ 2

8.5-M88.5-M88.5-M88.5-M88.5-M88.5-M86.5-M66.5-M68.5-M88.5-M8

10.5-M1010.5-M10

2634422634523242526582102

5252528282823242526582102

444444444444

SBR 50x24SBR 50x32SBR 50x40SBR 80x24SBR 80x32SBR 80x50SBQ 30x30SBQ 40x40SBQ 50x50SBQ 63x63SBQ 80x80

SBQ 100x100

SBR1000SBR1005SBR1010SBR1015SBR1020SBR1025SBQ1000SBQ1005SBQ1010SBQ1015SBQ1020SBQ1025

Bimetallic (CU-AL) sheets and washersSHEET WASHERS

ReferenceCode Amm

Bmm

Thicknessmm

1.010010010PBM 100x100PBM1000

ReferenceCode ØD1mm

ØD2mm

Thicknessmm

1.01.01.52.0

6.58.510.512.5

15182225

1001005050

RBM M6RBM M8RBM M10RBM M12

PBM2000PBM2005PBM2010PBM2015

MCR1100