Frequently Asked Questions

Yes, 100% free. All tools, templates, MCQs, and standard references are completely free — no hidden charges, no premium tier. Our mission is to support RMG factory electrical engineers in Bangladesh.

No registration required for downloading tools. Simply browse, click download, and use. However, creating a free account gives you access to your dashboard, download history, and bookmarking features.

Absolutely. All tools are designed specifically for real-world RMG factory use — RSC audits, IR testing, LPS assessments, and more. Use them freely in your professional work.

We review and update tools whenever standards change. BNBC 2020, NFPA 70E, and RSC Fire Manual references are kept current. Subscribe to our newsletter to get notified of updates.

OhmiclyLearn was created by experienced electrical engineers working in Bangladesh's RMG sector. We built it to solve the real problems we face daily — lack of accessible tools, unclear standard references, and time-consuming manual calculations.

The key electrical clauses are in Part 6 (Section 6.2 — Electrical Installation). This covers wiring methods, overcurrent protection, grounding, and panel schedules. Our RSC Checklist maps every clause for you.

BNBC 2020 primarily applies to new construction and major renovations. However, RSC audits often reference BNBC clauses for existing installations. Our tools help you bridge both scenarios.

BNBC 2020 is Bangladesh's national building code, while BS 7671 is the UK wiring regulation. BNBC borrows heavily from BS 7671 but adapts requirements for Bangladesh's climate and infrastructure. Our tools reference both where applicable.

The official BNBC 2020 document is published by the Ministry of Housing and Public Works. We provide key clause references and summaries in our tools. Visit our Standards section for detailed guides.

NFPA 70E is the US standard for electrical safety in the workplace. It defines arc flash boundaries, PPE requirements, and safe work practices. Many international buyers require NFPA 70E compliance for factory audits.

Arc flash incident energy depends on fault current, clearing time, and working distance. Use our Arc Flash PPE Calculator — it uses the IEEE 1584 method to calculate incident energy and recommends the correct PPE category.

NFPA 70E defines 4 PPE categories based on incident energy (cal/cm²). Category 1 (4 cal/cm²) requires FR shirt and safety glasses. Category 4 (40 cal/cm²) requires a full arc flash suit. Use our calculator to determine your exact category.

RSC audits verify 47+ clauses covering electrical installations, fire detection, emergency lighting, cable management, earthing systems, and more. Our RSC Checklist breaks down every clause with pass/fail criteria.

Start with our RSC Checklist — it covers all electrical clauses. Key areas: proper cable sizing, correct breaker ratings, functional earth continuity, labeled panels, and maintained IR test records. Download the checklist and do a self-audit first.

For cables and wiring: minimum 1 MΩ at 500V DC. For motors: minimum 1 MΩ per kV of rated voltage + 1 MΩ. Temperature-corrected values using k-factors are required. Our IR Test Report tool handles all corrections automatically.

RSC recommends annual IR testing for all electrical installations. Critical systems (fire pumps, emergency lighting) may require quarterly testing. Always keep records with temperature correction data for audit purposes.

Motor CB selection depends on full-load current (FLC), starting current, and cable size. Rule: CB rating = FLC × 1.25 (for continuous duty). Our CB Selection Calculator handles all standard motor ratings and trip curve selection.

Bangladesh follows a mix of BS 7671 and local standards: Brown (Live), Blue (Neutral), Green-Yellow (Earth). Three-phase: Brown, Black, Grey. Always verify with your factory's specific documentation. Our Wire Color Code tool shows all combinations.

Earth fault loop impedance (Zs) = Ze + (R1 + R2) × length / 1000. Ze is the external impedance, R1+R2 is the circuit conductor resistance per km. It must be low enough for the CB to trip within 0.4s (for 230V). Use our tools for quick calculations.

Earthing conductor size depends on the main protective conductor size. Minimum 10mm² for TN-S systems, 16mm² for TT systems. For factories, cross-reference with BNBC 2020 Table 6.2 and your specific fault current rating.

MCB (Miniature Circuit Breaker) protects against overcurrent and short circuits. RCD (Residual Current Device) protects against earth leakage and electrocution. For factory safety, you need both — MCBs for equipment protection, RCDs for personnel protection.