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PIS-CS-014/Critical systems

Grounding architecture for a data center

The building had earthing. The data center did not have a grounding architecture.

New CairoData & telecom3 min read
Data-center bonding from building bar to rackEngineered approach for PIS-CS-014. Coordinate the ICT bonding network with building PE. Bond racks and pathways; integrate surge and telecom interfaces. Commission continuity and transient/EMC interfaces as a system. Conceptual teaching detail, not an as-built drawing or construction instruction. © PIS Engineering Academy · All rights reserved.PIS ENGINEERING / CASE 014Data-center bonding from building bar to rackENGINEERED APPROACHSPDCOORDINATED BONDING BAR / CABLE PATHWAYRacks, pathways, telecom and surge interfaces need a shared design.1231Coordinate the ICT bondingnetwork with building PE.2Bond racks and pathways;integrate surge and telecominterfaces.3Commission continuity andtransient/EMC interfaces as asystem.READ THE DETAILEquipment, joints and current-path interfaces are shown in context.Conceptual teaching plate · no project dimensions or acceptance limits impliedPIS / REV 03© PIS Engineering Academy · All rights reserved

Engineering concept / vector field note

01

The field problem

Critical Data Center — New Cairo

The BOQ covered general MV, power and light-current earthing but lacked a dedicated data-center bonding/EMC concept.

why the obvious answer can be misleading

Sensitive ICT facilities require coordinated bonding topology, rack/cabinet bonding, telecom bonding, equipotential reference networks, surge control and EMC interfaces. A generic earth electrode schedule does not address these functions.

02

Why it failed

Sensitive ICT facilities require coordinated bonding topology, rack/cabinet bonding, telecom bonding, equipotential reference networks, surge control and EMC interfaces.

A generic earth electrode schedule does not address these functions.

03

Follow the engineering

Switch between the field condition and the engineering concept. Trace the path and examine what changes.

Inspect the engineering detail

Data-center bonding from building bar to rackEngineered approach for PIS-CS-014. Coordinate the ICT bonding network with building PE. Bond racks and pathways; integrate surge and telecom interfaces. Commission continuity and transient/EMC interfaces as a system. Conceptual teaching detail, not an as-built drawing or construction instruction. © PIS Engineering Academy · All rights reserved.PIS ENGINEERING / CASE 014Data-center bonding from building bar to rackENGINEERED APPROACHSPDCOORDINATED BONDING BAR / CABLE PATHWAYRacks, pathways, telecom and surge interfaces need a shared design.1231Coordinate the ICT bondingnetwork with building PE.2Bond racks and pathways;integrate surge and telecominterfaces.3Commission continuity andtransient/EMC interfaces as asystem.READ THE DETAILEquipment, joints and current-path interfaces are shown in context.Conceptual teaching plate · no project dimensions or acceptance limits impliedPIS / REV 03© PIS Engineering Academy · All rights reserved

Case 014 · Engineered approach

100%
Data-center bonding from building bar to rackEngineered approach for PIS-CS-014. Coordinate the ICT bonding network with building PE. Bond racks and pathways; integrate surge and telecom interfaces. Commission continuity and transient/EMC interfaces as a system. Conceptual teaching detail, not an as-built drawing or construction instruction. © PIS Engineering Academy · All rights reserved.PIS ENGINEERING / CASE 014Data-center bonding from building bar to rackENGINEERED APPROACHSPDCOORDINATED BONDING BAR / CABLE PATHWAYRacks, pathways, telecom and surge interfaces need a shared design.1231Coordinate the ICT bondingnetwork with building PE.2Bond racks and pathways;integrate surge and telecominterfaces.3Commission continuity andtransient/EMC interfaces as asystem.READ THE DETAILEquipment, joints and current-path interfaces are shown in context.Conceptual teaching plate · no project dimensions or acceptance limits impliedPIS / REV 03© PIS Engineering Academy · All rights reserved

Scroll to inspect. Numbered details match the notes below the drawing. Conceptual geometry; use the case text for the engineering requirements.

What changes

Create a data-center grounding and bonding architecture integrated with the building PE system, telecom bonding, racks, cable pathways, SPDs and the availability/redundancy concept.

Teaching schematic · not to scale© PIS Engineering Academy · All rights reserved
04

Correction & verification

Create a data-center grounding and bonding architecture integrated with the building PE system, telecom bonding, racks, cable pathways, SPDs and the availability/redundancy concept.

Verification recorded in the case

  • Commission continuity, bonding topology and transient/EMC interfaces as part of the data-center system, not only the building earth resistance.
  • Record as-built topology and connection points.
  • Repeat the measurement or functional test under a defined condition.
  • Confirm continuity and mechanical integrity of the corrected path.
  • Document instrument/setup, environmental condition and test method.
  • Close the NCR/case only when evidence supports the conclusion.
References & project context

References are reproduced from the PIS casebook. Select the governing edition and project acceptance criteria before using them for a design. The diagrams explain the concept, rather than define construction dimensions.

IEC 60364; IEC 62305-4; applicable telecom/data-center bonding standards and project Tier requirements.

PIS reviewed field handbook · PIS-CS-014

View the original social card
05

The engineering lesson

Critical digital reliability depends on bonding architecture, not on a single ohmic target.

Take the lesson into your next design review.

Keep exploring

Connected lessons.

All cases
Telecom bonding and common-mode interfacesEngineered approach for PIS-CS-036. Coordinate power, telecom and LPS reference interfaces. Verify bonding duty, separation, current paths and continuity. Correlate electrical changes with measured functional behaviour. Conceptual teaching detail, not an as-built drawing or construction instruction. © PIS Engineering Academy · All rights reserved.PIS ENGINEERING / CASE 036Telecom bonding and common-mode interfacesENGINEERED APPROACHPOWERLPS / TELECOM REFERENCE / POWER / SCREEN INTERFACESCorrelate potential/current-path changes with functional before/aftertests.1231Coordinate power, telecom andLPS reference interfaces.2Verify bonding duty,separation, current paths andcontinuity.3Correlate electrical changeswith measured functionalbehaviour.READ THE DETAILEquipment, joints and current-path interfaces are shown in context.Conceptual teaching plate · no project dimensions or acceptance limits impliedPIS / REV 03© PIS Engineering Academy · All rights reserved
36

Critical systems

Bonding architecture for telecom systems

Two earth systems did not create isolation. They created uncontrolled references.

Central telecommunications facility3 min
Medical IT supply with monitoring and alarmEngineered approach for PIS-CS-009. Integrate insulation and transformer monitoring with the supply. Provide local indication, alarm and coordinated circuit protection. Functionally test first-fault indication and protective coordination. Conceptual teaching detail, not an as-built drawing or construction instruction. © PIS Engineering Academy · All rights reserved.PIS ENGINEERING / CASE 009Medical IT supply with monitoring and alarmENGINEERED APPROACHISOLATING TRANSFORMERCIRCUITSMEDICAL LOADIMDALARMMONITOR → LOCAL INDICATIONIsolation, monitoring, alarm and protection form one architecture.1231Integrate insulation andtransformer monitoring withthe supply.2Provide local indication,alarm and coordinated circuitprotection.3Functionally test first-faultindication and protectivecoordination.READ THE DETAILEquipment, joints and current-path interfaces are shown in context.Conceptual teaching plate · no project dimensions or acceptance limits impliedPIS / REV 03© PIS Engineering Academy · All rights reserved
09

Critical systems

Completing the Medical IT system

An isolating transformer alone does not make a Medical IT system complete.

Hospital ICU3 min
A repeatable portable bonding interfaceEngineered approach for PIS-CS-030. Use a modular kit with defined robust connection interfaces. Separate the documented reference and diversion functions. Check installation and continuity on every deployment. Conceptual teaching detail, not an as-built drawing or construction instruction. © PIS Engineering Academy · All rights reserved.PIS ENGINEERING / CASE 030A repeatable portable bonding interfaceENGINEERED APPROACHEQUIPMENTMODULAR KIT / DEFINED FIELD INTERFACESReference, diversion and connection functions require a deployment check.1231Use a modular kit withdefined robust connectioninterfaces.2Separate the documentedreference and diversionfunctions.3Check installation andcontinuity on everydeployment.READ THE DETAILEquipment, joints and current-path interfaces are shown in context.Conceptual teaching plate · no project dimensions or acceptance limits impliedPIS / REV 03© PIS Engineering Academy · All rights reserved
30

Critical systems

Portable grounding for sensitive equipment

Critical equipment moved. Its reference earth had to move with it.

Location anonymised3 min
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