Commissioning
Commissioning is where a project proves itself – every electrical and mechanical system tested, verified against the design and documented before handover.
JDE provides commissioning managers and engineers who plan and run the process from L1–L3 support and witness testing through to a clean, well-evidenced handover and closeout.
Electrical SSoW
Electrical Safe Systems of Work control the highest-risk stage of any project – energisation. Every isolation, switching operation and permit must be planned, controlled and recorded.
From CESR and permit office management to LOTO, switching programmes and safety audits, JDE sets up and runs the governance that keeps people safe and projects compliant.
Mechanical SSoW
Mechanical systems carry serious hazards of their own – stored pressure, hot and chilled water and rotating plant that need the same permit-led control as electrical works.
JDE manages mechanical permits, isolations, pressure testing, flushing and TAB planning, so mechanical activities run safely and in step with the wider commissioning programme.
Authorised Persons
A safe system of work is only as strong as the people running it. JDE provides experienced electrical and mechanical personnel for safety-critical roles on site.
From Senior Authorised Persons and HV/LV Authorised Persons to Energy Marshals and Permit Controllers, we supply individual appointments or a complete permit office team, working to EN 50110.
Electrical Testing
Electrical testing proves that HV and LV systems are safe to energise and will perform as designed, from cable and switchgear through to protection and transformers.
Our engineers carry out HV cable and VLF testing, primary and secondary injection, protection relay and CT/VT testing, with dead and live testing and cable fault investigation when results don’t add up.
Mechanical Testing
Mechanical integrity has to be proven, not assumed. Bolted joints, pressure systems and welds all need testing and qualified inspection before a system can be trusted.
JDE provides torque testing, pneumatic and hydraulic pressure testing, CSWIP welding inspection, WPS & PQR approval, welder qualification and NDT interpretation.
M&E QA/QC
Quality checked as the work progresses means defects are found while they’re still quick and cheap to fix, not discovered at handover.
We deliver installation inspections, progressive quality assurance, snagging and defect management, technical compliance and welding traceability audits, through to final acceptance.
Technical Consultancy
Independent engineering advice from the earliest stages of a project helps clients avoid costly problems later, when changes are hardest to make.
JDE supports commissioning and energisation strategy, design and constructability reviews, technical due diligence and client engineering representation, providing independent technical assurance throughout.
Data Center Services
Data centres are at the heart of what we do. We commission the systems that keep them running, on new builds and in live, operational halls where downtime isn’t an option.
From UPS, generators and MV/LV distribution to chilled water, CRAH/CRAC and AHUs, BMS and EPMS, we deliver load bank testing and Integrated Systems Testing (IST) to prove the whole facility works together.
Project Support
Handover needs more than working systems. It needs clear, complete documentation behind them, so operators can rely on what they’re taking over.
We produce and review commissioning scripts, test packs, ITPs, method statements, asset registers and O&M documentation, along with the handover packs and technical reports that let projects close out cleanly.