Technical Trade SchoolBAS-200 installer-series
BAS-202
Concept reading and source route

BAS-202 Reading Guide

How to use this reading guide

This is the concept-review layer for a 100% online course. Read each module before its lesson, complete the retrieval prompts without looking, then use the linked authoritative sources to verify project-specific editions, requirements, and manufacturer procedures.

Online evidence is not OJL: browser simulations, document cases, and isolated remote equipment build reasoning and documentation skill; supervised field performance is recorded separately.

Module 1

Pathway system, authority, and work-package trace

Why it matters: The shortest or familiar route is not automatically approved; source hierarchy and coordination control.

Vocabulary and working scope

Source/destination; route; drawings/spec; adopted code/AHJ; listing; manufacturer; owner standard; trade scope; obstruction; environment; access; stop boundary.

Source-to-result trace

  1. Locate the controlling requirement and establish authority.
  2. Identify the physical and digital boundaries.
  3. Preserve as-found state and timestamps.
  4. Trace the initiating condition through logic, interfaces, equipment, and process response.
  5. Compare expected and actual evidence.
  6. Calculate with units and stated tolerance.
  7. Record action, result, restoration, uncertainty, and owner.

Worked thinking prompt

The reflected ceiling plan, electrical drawing, and controls detail show different routes around a rated corridor.

Calculation: Reconcile route dimensions, elevations, sources, interfaces, and unresolved conflicts.

Retrieval prompts

Module 2

Raceway family, environment, and selection

Why it matters: Material names are not universal permissions; the approved complete system and exact use conditions govern.

Vocabulary and working scope

EMT and other project-permitted raceways; flex; tubing/conduit distinction; corrosion/wet/damage exposure; fittings; boxes; listing; compatibility; serviceability.

Source-to-result trace

  1. Locate the controlling requirement and establish authority.
  2. Identify the physical and digital boundaries.
  3. Preserve as-found state and timestamps.
  4. Trace the initiating condition through logic, interfaces, equipment, and process response.
  5. Compare expected and actual evidence.
  6. Calculate with units and stated tolerance.
  7. Record action, result, restoration, uncertainty, and owner.

Worked thinking prompt

A damp mechanical room and outdoor transition are shown with the same material and fittings as a dry office ceiling.

Calculation: Compare all required environmental, mechanical, dimensional, and listing fields; calculate material quantities and transitions.

Retrieval prompts

Module 3

Route coordination, elevations, supports, and layout datum

Why it matters: Measure from controlled datums and actual endpoints; accumulated assumptions become visible misalignment and rework.

Vocabulary and working scope

Plans/elevations; scale; field verification; level/plumb; ceiling/grid; structure; other trades; access; service clearances; support points; expansion/movement; datum; mark sequence.

Source-to-result trace

  1. Locate the controlling requirement and establish authority.
  2. Identify the physical and digital boundaries.
  3. Preserve as-found state and timestamps.
  4. Trace the initiating condition through logic, interfaces, equipment, and process response.
  5. Compare expected and actual evidence.
  6. Calculate with units and stated tolerance.
  7. Record action, result, restoration, uncertainty, and owner.

Worked thinking prompt

A panel hub and sensor box are at different elevations with duct, sprinkler, and access-door conflicts.

Calculation: Use drawing scale and dimensions to calculate lengths, elevations, support count from supplied criteria, and material allowance.

Retrieval prompts

Module 4

Bender anatomy, take-up/deduct, gain, and stub-up 90s

Why it matters: Use the exact bender markings and verified reference table; memorized take-up from another tool is not evidence.

Vocabulary and working scope

Hand bender; arrow/star/rim marks; shoe size; take-up/deduct; gain; stub height; back-to-back; developed length; springback awareness; cut/mark/orient.

Source-to-result trace

  1. Locate the controlling requirement and establish authority.
  2. Identify the physical and digital boundaries.
  3. Preserve as-found state and timestamps.
  4. Trace the initiating condition through logic, interfaces, equipment, and process response.
  5. Compare expected and actual evidence.
  6. Calculate with units and stated tolerance.
  7. Record action, result, restoration, uncertainty, and owner.

Worked thinking prompt

A 10-inch stub must land at a box, but the learner uses a take-up value from a different conduit size.

Calculation: Calculate mark=desired stub-take-up, verify developed length/gain using the supplied method, and check orientation.

Retrieval prompts

Module 5

Offsets: rise, multiplier, spacing, shrink, and direction

Why it matters: An offset is geometry plus tool execution; multiplier and shrink values must come from the selected angle/method and be checked in the field.

Vocabulary and working scope

Two-bend offset; angle; rise; multiplier; distance between marks; shrink; obstacle clearance; parallel runs; dogleg; arrow orientation.

Source-to-result trace

  1. Locate the controlling requirement and establish authority.
  2. Identify the physical and digital boundaries.
  3. Preserve as-found state and timestamps.
  4. Trace the initiating condition through logic, interfaces, equipment, and process response.
  5. Compare expected and actual evidence.
  6. Calculate with units and stated tolerance.
  7. Record action, result, restoration, uncertainty, and owner.

Worked thinking prompt

A conduit must rise 4 inches over a beam and still land at a box centerline with limited run length.

Calculation: Compute spacing=rise x multiplier, shrink from supplied factor, new cut/landing position, and reasonableness against the route.

Retrieval prompts

Module 6

Kicks, saddles, and rolling offsets

Why it matters: Advanced bends require a diagram, controlled references, plane/orientation marks, and verification; extra bends are not free.

Vocabulary and working scope

Kick; kick-with-90; three/four-point saddle; center mark; obstacle width/height; rolling offset; horizontal/vertical displacement; true offset; rotation; compound error.

Source-to-result trace

  1. Locate the controlling requirement and establish authority.
  2. Identify the physical and digital boundaries.
  3. Preserve as-found state and timestamps.
  4. Trace the initiating condition through logic, interfaces, equipment, and process response.
  5. Compare expected and actual evidence.
  6. Calculate with units and stated tolerance.
  7. Record action, result, restoration, uncertainty, and owner.

Worked thinking prompt

The route shifts 6 inches sideways and 8 inches vertically around a pipe rack before a final box.

Calculation: Compute true rolling offset using the Pythagorean relationship, then multiplier spacing, shrink/allowance, and total bend.

Retrieval prompts

Module 7

Boxes, fittings, entries, flex, supports, and workmanship

Why it matters: Fittings and supports are part of the approved pathway; making parts fit or look straight does not prove suitability.

Vocabulary and working scope

Box size/use; connectors/couplings; bushings; hubs; knockouts; sealing; flex/vibration; drip path; enclosure rating; conductor protection; approved structure/hardware; fastening substrate; support spacing; alignment; corrosion; access.

Source-to-result trace

  1. Locate the controlling requirement and establish authority.
  2. Identify the physical and digital boundaries.
  3. Preserve as-found state and timestamps.
  4. Trace the initiating condition through logic, interfaces, equipment, and process response.
  5. Compare expected and actual evidence.
  6. Calculate with units and stated tolerance.
  7. Record action, result, restoration, uncertainty, and owner.

Worked thinking prompt

A top entry creates a water path, flex lacks strain/support control, and a straight run is tied to another trade support.

Calculation: Reconcile material quantities and supplied box/entry/support criteria; calculate bend space, supports, defects, corrections, and reinspection coverage.

Retrieval prompts

Module 8

Fill, conductor/cable area, and pull planning

Why it matters: Fill and pull limits depend on the actual conductors/cables, raceway, adopted rule, project, and manufacturer information.

Vocabulary and working scope

Raceway area; conductor/cable dimensions; applicable fill rule; mixed cable; derating/ampacity interface awareness; pull points; total bend; pull tension; lubricant; roles; stop signals.

Source-to-result trace

  1. Locate the controlling requirement and establish authority.
  2. Identify the physical and digital boundaries.
  3. Preserve as-found state and timestamps.
  4. Trace the initiating condition through logic, interfaces, equipment, and process response.
  5. Compare expected and actual evidence.
  6. Calculate with units and stated tolerance.
  7. Record action, result, restoration, uncertainty, and owner.

Worked thinking prompt

A proposed run contains mixed controls cables, four 90-degree bends, no pull point, and no documented cable area.

Calculation: Sum supplied conductor/cable areas, apply the assigned criterion, calculate percent fill and total bend, and test alternatives.

Retrieval prompts

Module 9

Penetrations, firestop, barriers, grounding/bonding interfaces

Why it matters: Penetration and firestop work preserves an assembly, not just a hole; exact listed system, trade scope, and AHJ/project process govern.

Vocabulary and working scope

Rated/nonrated assembly; listed firestop system; sleeve; annular space; smoke/water/weather seal; barrier; bonding path; life-safety coordination; inspection label; responsible trade.

Source-to-result trace

  1. Locate the controlling requirement and establish authority.
  2. Identify the physical and digital boundaries.
  3. Preserve as-found state and timestamps.
  4. Trace the initiating condition through logic, interfaces, equipment, and process response.
  5. Compare expected and actual evidence.
  6. Calculate with units and stated tolerance.
  7. Record action, result, restoration, uncertainty, and owner.

Worked thinking prompt

A controls raceway crosses a rated wall beside life-safety systems and the detail does not identify the firestop system.

Calculation: Reconcile penetrations by assembly/system/size/owner and calculate completion and inspection status.

Retrieval prompts

Module 10

Release, correction, redline, and OJL defense

Why it matters: Pathway release requires all temporary marks/materials, open ends, defects, changes, and records reconciled.

Vocabulary and working scope

Route walkdown; dimensions; labels; pull readiness; burr/debris; fittings; supports; fill/bend; penetrations; photo/redline; punch; correction/retest; cleanup; as-left; OJL plan.

Source-to-result trace

  1. Locate the controlling requirement and establish authority.
  2. Identify the physical and digital boundaries.
  3. Preserve as-found state and timestamps.
  4. Trace the initiating condition through logic, interfaces, equipment, and process response.
  5. Compare expected and actual evidence.
  6. Calculate with units and stated tolerance.
  7. Record action, result, restoration, uncertainty, and owner.

Worked thinking prompt

Cable pull is scheduled, but one offset dimension, two supports, a penetration system, and the final redline are unresolved.

Calculation: Reconcile planned/installed/inspected/passed/corrected/reinspected/as-built counts and calculate pull-readiness completeness.

Retrieval prompts

Required and deeper reading

Adoption note: Standards, codes, project requirements, owner criteria, manufacturer instructions, and employer safety programs control. Confirm the adopted edition and authority before applying a numeric requirement.