JS Design Orbit

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JS Design Orbit JS Design Orbit provides professional AutoCAD drafting, architectural floor plans, and electrical design services for residential and commercial buildings.

Let's Talk-3:Most engineers think "Reference Method A" means ONE thing.It doesn't. It's actually a family of 6 different...
27/07/2026

Let's Talk-3:

Most engineers think "Reference Method A" means ONE thing.

It doesn't. It's actually a family of 6 different real-world scenarios — all grouped together because they share the same problem: heat trapped with almost nowhere to go.

Here's what falls under Method A:

→ Single-core cable in conduit, embedded in a wall → 3-core cable in conduit, embedded in a wall → 3-core cable direct in a wall, no conduit at all → Non-sheathed cables run in surface moulding → Non-sheathed/single/multicore cable in an architrave → Cable routed through a window frame

Different physical situations. Same thermal reality — the cable is enclosed in a narrow channel or cavity, with heat only able to escape through one side.

That's the real logic behind BS7671's reference methods: it's not really about "what does the installation look like" — it's about "how much airflow does the cable actually get." Six very different-looking installations can share one rating because they trap heat the same way.

This is the kind of detail that separates a cable size that just "looks right" on a drawing from one that's actually been engineered for how it's installed.

I work through this level of detail on every panel schedule, riser diagram, and SLD I produce — under BS7671, NEC, CEC, SEC (Saudi), German, and Australian standards.

Our company also provides complete electrical design services — lighting, power, CCTV, ELV, and KNX system design — so projects can be covered end to end, from concept to final drawings.

♻️ Repost if you think more engineers should talk about this
💬 Which of these six did you not expect to see grouped together?

Let's Talk-2:Before you even open the derating tables, one decision already shapes your cable size.The Reference Method....
27/07/2026

Let's Talk-2:

Before you even open the derating tables, one decision already shapes your cable size.

The Reference Method.

Here's what a lot of engineers skip past —

Two identical cables, same size, same load, same standard — can have completely different current ratings. Not because of grouping. Not because of ambient temperature. Because of HOW they're installed.

BS7671 defines this with Reference Methods A through G:

→ Method A — conduit buried inside a thermally insulated wall → Method B — conduit or trunking mounted on a wall surface → Method C — clipped direct, or on a solid (unperforated) tray → Method D — buried directly in the ground, or in a duct → Method E — single-core cables on a perforated tray, free air → Method F — multi-core cable on a perforated tray, free air → Method G — bare cables spaced apart on insulators

The physics behind it is simple: heat needs somewhere to go. A cable buried in insulation (Method A) traps heat badly. The same cable spaced out on insulators (Method G) sheds heat easily. Same conductor, same insulation rating — very different safe operating current.

Get the reference method wrong, and every downstream number is wrong too — the base ampacity, the grouping factor, the final cable size. It's the first domino.

This is one of the first things I check before running any cable sizing calculation — under NEC, BS7671, IEC, SEC (Saudi), German, or Australian standards. Different codebooks, same underlying principle: installation method decides how much heat a cable can safely shed.

Our company also provides complete electrical design services — lighting, power, CCTV, ELV, and KNX system design — so projects can be covered end to end, from concept to final drawings.

♻️ Repost if you think more engineers should talk about this
💬 Which reference method trips people up the most on your projects?

⚡ Need an Electrical Design for an EV Charging Station?I now offer a fully CUSTOM EV Charging Station Electrical Design ...
25/07/2026

⚡ Need an Electrical Design for an EV Charging Station?

I now offer a fully CUSTOM EV Charging Station Electrical Design service — drafted to YOUR site, charger brand, and configuration. Not a generic template!

✅ Site Plan & Charger Placement
✅ Single Line Diagram (SLD)
✅ Panel & Load Schedule
✅ Feeder & Breaker Sizing
✅ NEC, CEC, IEC, BS7671, Saudi SBC & AS/NZS standards
✅ PDF, delivered in 3–5 business days

Perfect for engineers, contractors, and EV infrastructure developers who need a code-compliant, permitting-ready drawing set.

👉 Check it out here: https://www.etsy.com/listing/4489000226/tesla-ev-electric-vehicle-charging

""Please save your Child & Person""Every monsoon, Pakistan loses children to a danger we can actually prevent.Floodwater...
24/07/2026

""Please save your Child & Person""
Every monsoon, Pakistan loses children to a danger we can actually prevent.

Floodwater on our streets isn't just water — when a submersible pump motor or its cable joint sits at ground level with no earth leakage protection, that water becomes a live electrical circuit. Kids playing outside, wading through it, don't stand a chance.

This isn't bad luck. It's a preventable engineering failure:
❌ No RCD/ELCB (30mA) on pump circuits
❌ No proper earthing/bonding of motor bodies
❌ Panels & joints not rated IP68, sitting exposed at street level
❌ No isolation when water starts rising
❌ No warning signage near pump/motor points

As electrical engineers, this falls on us to fix — and it doesn't cost much:
✅ Install RCD/ELCB on every motor & pump circuit
✅ Proper equipotential bonding + verified earth electrode
✅ IP68 cable joints, mounted above flood level
✅ Accessible isolators — cut power the moment water rises
✅ Barriers & signage around motor installations in flood-prone streets

A ৳2,000 RCD breaker is the difference between a rainy day and a funeral.

If you're a homeowner, building manager, or contractor — check your pump motor connections today, before the next downpour. Share this. Someone's child may depend on it.

Just contact us Tha⚡ Electrical Design Services for Residential Homes — Done Right, Per NEC ⚡Building or renovating a ho...
24/07/2026

Just contact us Tha⚡ Electrical Design Services for Residential Homes — Done Right, Per NEC ⚡

Building or renovating a home? Get your electrical layout designed professionally in AutoCAD, based on the NEC (National Electrical Code) ✅

Here's what I can do for you:
🔹 Single Line Diagram (SLD)
🔹 Load Calculations
🔹 Panel Schedule
🔹 Electrical Floor Plan (lighting + power layout)
🔹 Riser Diagram

📐 Clean, accurate, code-based drawings — no guesswork.

⚠️ Note: This is a design & drafting service only — it does not include a PE stamp. If your permit requires a licensed stamp, I can prepare the drawings for your local PE to review and seal.

👨‍💼 Engr. Shakeel Akhtar — Electrical Engineer (UET Lahore), 1,500+ projects completed.

📩 Message me here or reach out on Upwork: https://www.upwork.com/freelancers/jsdesignorbit

Now offering custom electrical design & drafting — based strictly on NEC.I'm CEO of JSdesignOrbit / SAdesign, and I'm op...
24/07/2026

Now offering custom electrical design & drafting — based strictly on NEC.

I'm CEO of JSdesignOrbit / SAdesign, and I'm opening up a new service: AutoCAD electrical design and drafting for residential projects, drafted to NEC (National Electrical Code) requirements.

What's included:
✅ Single Line Diagram (SLD)
✅ Electrical Floor Plan (lighting + power layout)
✅ Panel Schedule
✅ Riser Diagram
✅ NEC Load Calculations
✅ Material Takeoff

Delivered as PDF, with an optional AutoCAD DWG source file add-on for anyone who needs to edit the drawings further.

Note: this is a design and drafting service — it does not include a PE stamp/seal. If your local AHJ requires a licensed stamp for permit submission, I can prepare the technical drawings for your local PE to review and seal.

Backed by 1,500+ completed freelance projects across residential, commercial, and industrial electrical design (Fiverr since 2018, Upwork since 2020).

📩 Get in touch on Upwork: https://www.upwork.com/freelancers/jsdesignorbit

Let's Talk-1:Most cable sizing mistakes I see in electrical drawings don't come from wrong formulas.They come from skipp...
09/07/2026

Let's Talk-1:

Most cable sizing mistakes I see in electrical drawings don't come from wrong formulas.

They come from skipping ONE step: grouping.

Here's the thing engineers new to cable sizing often miss —

A cable's rated current-carrying capacity (Iz) isn't a fixed number. It changes depending on what's happening AROUND it.

Every current-carrying conductor generates heat internally (I²R losses). A single, isolated cable in free air sheds that heat easily.

But bundle 4, 6, or 10 circuits together in one tray, trunking, or duct — and now every cable is radiating heat onto its neighbors. Less heat escapes. Internal temperature rises. The insulation's thermal limit gets closer, faster.

That's exactly why grouping/derating factors (Cg) exist — in NEC, BS7671, IEC, and every major standard I work with.

The rule is simple once you see it:

→ 1 circuit, standalone = Cg = 1.00 (no derating) → 2+ circuits bunched together = Cg drops, sometimes down to 50-60% of rated capacity → Ignore it, and you've got a cable running hotter than its insulation was designed for — a slow, invisible fire risk hiding behind a "correct" looking single-line diagram

I've worked this into panel schedules, riser diagrams, and SLDs across residential, commercial, and industrial projects — under NEC, CEC, SEC (Saudi), German, and Australian standards. Different codebooks, same physics.

Cable sizing isn't just "pick a size that carries the load." It's temperature management, disguised as a table lookup.

If your project involves complex feeder runs, tray/conduit congestion, or multi-standard compliance — this is the kind of detail I check before it becomes a site problem.

Our company also provides complete electrical design services — lighting, power, CCTV, ELV, and KNX system design — so projects can be covered end to end, from concept to final drawings.

♻️ Repost if you think more engineers should talk about this 💬 What's the trickiest derating scenario you've run into?

Here's a concise, professional LinkedIn post:---📐 **Professional MEP Drafting Services**I provide accurate and construct...
08/07/2026

Here's a concise, professional LinkedIn post:

---

📐 **Professional MEP Drafting Services**

I provide accurate and construction-ready **MEP drafting** services for:

⚡ Electrical Drawings
🚰 Plumbing Drawings
❄️ HVAC Drawings

In addition, I also provide **Electrical Design** services, including load calculations, panel schedules, riser diagrams, and NEC-compliant layouts.

If you have a design or markups, I can convert them into clean, professional CAD drawings with a quick turnaround.

📩 **Let's discuss your project and bring your drawings to life.**

1,500+ orders. 4.7 rating. One gig that started as a side hustle in 2018.I want to share something I've been building qu...
08/07/2026

1,500+ orders. 4.7 rating. One gig that started as a side hustle in 2018.

I want to share something I've been building quietly for years: my Fiverr gig for electrical design — lighting layouts, load calculations, single line diagrams, and panel schedules for permit approval.

What's inside:

⚡ Indoor & outdoor lighting layout plans
⚡ Power receptacle / socket layout plans
⚡ AC split system & heating layout plans
⚡ Fire alarm system layout plans
⚡ Low voltage / networking drawings
⚡ Panel schedules & load calculations
⚡ Single Line Diagrams (SLD) & Riser Diagrams

All drawings are prepared in AutoCAD, built to the code your jurisdiction requires — NEC, CEC, DEWA, Saudi, German, Australian, and more.

Whether it's a single apartment or a full commercial/industrial building, the drawings are made to actually pass permit review — not just look good on paper.

If you're a contractor, developer, or consultant who needs electrical drawings you can submit with confidence, here's the gig:
🔗 https://www.fiverr.com/s/P2kLAzp

Always open to questions — drop them below or DM me directly.

Building an EV charging station? Get the electrical done right. ⚡🚗At JS Design Orbit, I design the full electrical packa...
06/07/2026

Building an EV charging station? Get the electrical done right. ⚡🚗
At JS Design Orbit, I design the full electrical package — site layout, single line diagram, panel schedules, load calculations, cable sizing, and conduit details. All to NEC & IET standards and ready for permit. ✅
⭐ 1,500+ orders · 4.9-star rated · trusted by repeat clients across the US, Canada & beyond.
👉 Let's plan your project: https://www.fiverr.com/s/o83zV1g

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