Study Guide: Alex for Skilled Trades Students

Your reference for applying AI to job estimating, technical documentation, safety compliance, troubleshooting, and career growth in the trades. Ready-to-run prompts — built for welders, HVAC techs, electricians, mechanics, construction workers, and machinists.

What This Guide Is Not

This is not a habit formation guide (see Self-Study Guide for that). This is a domain use-case library — how AI supports your trades education and on-the-job performance in real, practical ways.

Where to Practice These Prompts

Every prompt in this guide works with any AI assistant — ChatGPT, Claude, GitHub Copilot, Gemini, or whatever tool you prefer. The prompts are the skill; the tool is just where you type them. Pick the one you’re comfortable with and start today.

For an integrated experience, the Alex VS Code extension (free) was purpose-built for this workshop.

You don’t need a specific tool to benefit. You need the habit of using AI to handle the paperwork, research, and planning — so you can focus on the craft.

Core Principle for Skilled Trades Students

Nobody is going to hire an AI to run conduit, braze a joint, or frame a wall. Your hands-on skills are irreplaceable. But the tradespeople who advance — who become foremen, estimators, inspectors, or business owners — are the ones who can also write clear estimates, document their work, troubleshoot systematically, and communicate professionally. AI handles the desk work faster so you can spend more time building things.

The Seven Use Cases

1. Job Estimating and Bidding

The trades student’s estimating challenge: Estimating is where trades careers either grow or stall. Underestimate and you lose money. Overestimate and you lose the job. The math isn’t hard — it’s the experience of knowing what to include, what goes wrong, and how long things really take. AI can help you build estimates that don’t leave money on the table or time off the schedule.

Prompt pattern:

I need to estimate a [job type: residential HVAC install / commercial electrical rough-in / bathroom renovation / welding repair / roof replacement].

Job details: [scope, materials, dimensions, conditions, access challenges].
Location: [region — for labor rate context].

Help me:
1. Build a materials list with quantities and approximate costs
2. Estimate labor hours for each phase of the job — be realistic, not optimistic
3. Identify the things that usually get missed in estimates for this type of work (permits, disposal, travel, callbacks)
4. Structure this as a professional bid that a customer or general contractor can understand

Follow-up prompts:

The customer says my bid is too high. Help me identify where I can reduce cost without cutting quality or safety — and where I should hold the line.

This job has a change order. The customer wants [addition]. Help me price it fairly and write the change order document.

I keep underestimating [type of job]. What am I probably missing? Build me a checklist for this type of estimate.

2. Technical Troubleshooting

The trades student’s diagnostic challenge: When something doesn’t work, you need a systematic approach — not random part-swapping. The technician who can diagnose root causes efficiently saves time, money, and repeat callbacks. AI is your thinking partner for working through diagnostic trees when you’re stuck.

Prompt pattern:

I'm troubleshooting a [system type: HVAC system / electrical circuit / plumbing issue / engine problem / mechanical assembly].

Symptoms: [what's happening — be specific about what you observe].
What I've checked so far: [tests performed, readings taken, parts inspected].
System details: [make, model, age, configuration if known].

Help me:
1. Based on these symptoms, what are the three most likely causes in order of probability?
2. What's the most efficient diagnostic sequence — what do I check next and why?
3. What would rule out each possible cause? (Help me narrow it down without replacing everything)
4. Is there a safety concern I should address before continuing diagnostics?

Follow-up prompts:

I replaced [part] and the problem persists. What did I miss? Help me rethink my diagnostic approach.

I'm getting a reading of [value] on my multimeter. Is that normal for this circuit? Walk me through what it means.

The customer says "it's been acting funny for months." Help me ask the right questions to get useful diagnostic information from a non-technical person.

3. Safety Documentation and Compliance

The trades student’s safety challenge: OSHA compliance isn’t paperwork — it’s what keeps you alive. Job Hazard Analyses, safety plans, toolbox talks, and incident documentation are required on professional job sites. The student who can produce this documentation efficiently stands out to employers.

Prompt pattern:

I need to create a [document type: Job Hazard Analysis (JHA) / safety plan / toolbox talk / incident report / lockout-tagout procedure] for [task or job site].

Work being performed: [describe the task].
Hazards present: [what I've identified — heights, electrical, confined space, chemicals, heat, heavy equipment].
Workers involved: [number and skill levels].

Help me:
1. Complete the hazard analysis — identify hazards I may have missed
2. Match each hazard with specific engineering controls, PPE, and safe work practices
3. Format this as a professional document my supervisor would approve
4. Include the regulatory references (OSHA standards) that apply

Follow-up prompts:

I need to deliver a 10-minute toolbox talk on [topic: fall protection / electrical safety / heat illness / trenching / silica dust]. Make it engaging, not just reading from a sheet.

There was a near-miss on the job site: [describe]. Help me write the incident report and identify corrective actions.

Walk me through lockout-tagout for [specific equipment]. I understand the concept but I'm not confident in the sequence for this machine.

4. Code Compliance and Inspections

The trades student’s code challenge: Building codes, electrical codes (NEC), plumbing codes, and mechanical codes are the law. Failing an inspection means ripping out work and doing it again — at your cost if you’re the contractor. Understanding code well enough to pass inspection the first time is a career-defining skill.

Prompt pattern:

I need to check my work against code for [trade: electrical / plumbing / HVAC / structural / fire protection].

What I've installed or planned: [describe the work — materials, methods, dimensions, ratings].
Jurisdiction: [state/city if known — codes vary by location].

Help me:
1. Identify the specific code sections that apply to this work
2. Check for common violations that trip up students and apprentices
3. Walk me through what the inspector is going to look at and in what order
4. If something doesn't meet code, explain what the fix is — not just that it's wrong

Follow-up prompts:

I'm wiring [circuit description]. Does this meet NEC requirements for wire sizing, breaker rating, and box fill? Walk me through the calculation.

My inspection failed for [reason]. I don't understand why. Explain the code requirement and show me the correct installation.

What changed in the latest code update for [trade]? Give me the changes most likely to affect my current work.

5. Technical Writing and Communication

The trades student’s communication challenge: Service reports, work orders, warranty claims, and customer communication are part of every trades job. The technician who writes clear, professional documentation gets paid faster, has fewer disputes, and builds trust with customers and general contractors.

Prompt pattern:

I need to write a [document type: service report / work order / warranty claim / customer explanation / equipment commissioning report].

What I did: [describe the work performed].
What I found: [diagnostic findings, conditions discovered].
What the customer needs to know: [recommendations, next steps, costs].

Help me:
1. Write this in clear, professional language — not jargon the customer won't understand
2. Include the technical details that matter for documentation purposes
3. Structure the recommendations so the customer can make an informed decision
4. Flag anything that should be documented for liability or warranty purposes

Follow-up prompts:

A customer is asking me to explain why [repair/installation] costs what it does. Help me make the case — the value, not just the price.

I need to write a scope of work for a subcontractor. Include the deliverables, standards, and acceptance criteria so there's no confusion about what "done" means.

My supervisor said my service reports lack detail. Take my rough notes and show me what a professional report looks like for this type of work.

6. Apprenticeship and Certification Preparation

The trades student’s advancement challenge: Journeyman licenses, EPA certifications, industry credentials — these are the gatekeepers to higher pay and better jobs. The exams test applied knowledge, not theory. You need to understand the code AND apply it to realistic scenarios.

Prompt pattern:

I am preparing for [certification: journeyman exam / EPA 608 / OSHA 30 / AWS welding cert / HVAC Excellence / other].
Topic I'm struggling with: [specific area].
Exam format: [written / practical / both].

Help me:
1. Generate scenario-based practice questions at exam difficulty level
2. Explain the code, standard, or principle being tested — not just the answer
3. Identify the topics where I need the most practice based on what I'm getting wrong
4. Give me a realistic study plan for [time until exam]

Follow-up prompts:

I keep getting NEC calculations wrong. Walk me through [calculation type: voltage drop / box fill / conduit fill / ampacity] step by step, then quiz me.

For the welding certification test, what are the most common reasons people fail the practical portion? Help me prepare.

I passed my certification but I still feel shaky on [topic]. Help me build real confidence, not just test-passing knowledge.

7. Starting Your Own Business

The trades student’s entrepreneurship challenge: Many tradespeople eventually want to work for themselves. The technical skills are there — what’s missing is business knowledge: licensing, insurance, estimating, marketing, bookkeeping, and managing employees. AI can help you plan the business side before you bet your savings on it.

Prompt pattern:

I want to start my own [trade] business after I complete my [apprenticeship / program / certification].
My situation: [experience level, savings, location, market conditions].

Help me:
1. Map the licensing and insurance requirements for my trade and location
2. Build a basic business plan — startup costs, pricing strategy, break-even analysis
3. Identify the most common reasons trade businesses fail in the first three years
4. Plan my marketing strategy — how do I get my first 10 customers?

Follow-up prompts:

How do I price my work? I don't want to be the cheapest, but I'm new and don't have a reputation yet. Help me find the right positioning.

I need a service agreement template for [type of work]. Include the terms that protect me from scope creep, non-payment, and liability.

When should I hire my first employee vs. sub out work? Walk me through the financials and the legal implications.

What Great Looks Like

After consistent use, you should notice:

• Your estimates are more accurate and you’re winning more bids at fair prices
• Troubleshooting is systematic, not random — you diagnose faster with fewer unnecessary part replacements
• Your safety documentation is professional-grade and audit-ready
• Code compliance is something you understand, not just something you hope to pass
• You’re building toward a career with advancement, not just a paycheck

The trades students who benefit most from AI are the ones who use it for the business and documentation side of the trade — because the hands-on skills are yours. AI can’t hold a wrench. But it can help you run the business that puts the wrench in your hand.

Your AI toolkit: These prompts work in ChatGPT, Claude, Copilot, Gemini — and in the Alex VS Code extension, which was designed around them. Start with whatever you have. The skill transfers across all of them.

Your First Week: Practice Plan

Month 2–3: Advanced Applications

Job Log

Track your growing experience:

/saveinsight title="Job: [type]" insight="Scope: [what I did]. Challenges: [what went wrong or was unexpected]. Solution: [how I fixed it]. Estimating lesson: [what I'd quote differently now]. Code considerations: [what I learned about compliance]." tags="trades,experience,estimating"

Code Knowledge Builder

/saveinsight title="Code: [section/topic]" insight="Requirement: [what the code says]. Common violation: [what people get wrong]. Correct method: [how to meet it]. Source: [NEC article / OSHA standard / IMC section]." tags="trades,code,compliance"

Continue your practice: Self-Study Guide — the 30/60/90-day habit guide.