PlanElec vs. Excel & Paper: Why Digital Single-Line Diagrams Are Better

Many homeowners and even some electricians still reach for pen and paper or Excel when they need to create a single-line diagram. At first glance, this seems free and simple — but it carries significant risks. In this comparison, we show why a specialized tool like PlanElec is the better choice.

TL;DR — Comparison at a Glance

The Reality: Many Still Draw by Hand

Although we are in 2026, the reality in Belgium is often still analog. During renovations, extensions, or the sale of a property, owners must present an up-to-date single-line diagram and situation plan. Many turn to what they know: a sheet of paper or an Excel spreadsheet.

The problem? The inspector at the electrical inspection expects regulation-compliant plans — and these are nearly impossible to create on paper or in Excel.

Problems with Paper

Not Regulation-Compliant

The AREI/RGIE (General Regulations on Electrical Installations) prescribes specific symbols (Table 2.23, based on IEC 60617). Hand-drawn symbols almost never meet the regulatory requirements. An inspector can reject the plan if the symbols are not correct.

Difficult to Modify

Made a mistake or forgot a socket? With a hand-drawn plan, you have to redraw the entire diagram. For complex installations with 20+ circuits, this is an enormous time investment.

Illegible

Handwriting is subjective. What is clear to you may be illegible to the inspector. Crossed-out corrections make it even worse.

Risk of Rejection at Inspection

More and more inspectors reject hand-drawn plans or accept them only reluctantly. The AREI (Art. 9.1.2) does not prescribe that plans must be created digitally. What matters is that the documentation is legible, complete, and regulation-compliant. A neatly hand-drawn plan with correct AREI symbols is permitted under the AREI — but the risk of objection with illegible or incorrect hand drawings remains high.

Problems with Excel

No AREI Symbols

Excel does not know electrical symbols. You would have to insert each symbol as an image or painstakingly recreate it with shapes. The result looks unprofessional and does not comply with the standard.

No Automatic Layout

A single-line diagram has a clear structure: main switch, RCDs, circuit breakers, consumers — all in a defined hierarchy. In Excel, you must build this structure manually and adjust it with every change.

No Validation

Excel does not check whether your diagram is AREI-compliant. Is an RCD missing? Is the cable cross-section too small? Do you have too many circuits per RCD? Excel does not know — but the inspector does.

Formatting Issues

Larger diagrams do not fit on an A4 page. Excel's print preview is notorious for unexpected page breaks and cut-off content.

PlanElec Advantages in Detail

Regulation-Compliant Symbols

PlanElec exclusively uses AREI-compliant symbols according to IEC 60617. Sockets, switches, luminaires, protection devices — all symbols comply with the standard and are accepted by the inspector.

Automatic Layout (Goethals-Jacobs)

PlanElec automatically creates the layout according to the Belgian standard: two busbars (main and sub-distribution), RCDs, circuit breakers, and consumers are correctly arranged. You do not need to worry about the graphical representation.

Automatic AREI Validation

More than 20 inspection rules monitor your installation in real-time:

• Maximum number of circuits per RCD: max. 8 (Art. 4.2.4.3b)
• Cable cross-sections matching the circuit breaker
• Surge protection (SPD)
• Bathroom zone protection (Art. 7.1)
• And much more

Modifiable at Any Time

Forgot a socket? Need to add a circuit? With PlanElec, you add changes in seconds. The layout adjusts automatically — no redrawing, no formatting chaos.

Professional PDF Export

One click and you have a professional PDF in A4 landscape format — with title block, page numbering, and regulation-compliant symbols. Exactly what the inspector expects.

The Price Argument: "Free" Is Not Without Cost

Paper and Excel seem free. But let us do the math:

Scenario: Rejection at Inspection

1. You draw your diagram on paper or in Excel: €0
2. The inspector rejects the plan: re-inspection €80-120
3. You hire an electrician to recreate the plan: €150-300
4. New inspection: €150-200

Total cost upon rejection: €380-620

With PlanElec:

1. Create single-line diagram with PlanElec: €49
2. Inspection passed on the first try: €150-200

Total cost: €199-249

The supposed savings from paper/Excel can end up costing you three to four times as much.

When Paper Still Works

To be fair: for very simple installations (e.g., a single circuit in a garden shed), some inspectors still accept a neatly hand-drawn plan. But as soon as the installation has more than 3-4 circuits, paper becomes confusing and error-prone.

Conclusion

Paper and Excel are not suitable tools for creating single-line diagrams. The missing standard symbols, manual layout, and absent validation quickly negate the supposed cost advantage — at the latest during the inspection.

PlanElec offers everything you need for €49: regulation-compliant symbols, automatic layout, AREI validation, and professional PDF export. An investment that pays for itself at the first inspection appointment.

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Done with Paper and Excel!

With PlanElec, create your regulation-compliant single-line diagram in just a few steps — directly in the browser, with automatic AREI validation and professional PDF export. Get started now →