Chapter 2 of 715% of exam
Material Selection and Estimation
Choose cable, connectors, pathway and tools by category, rating and environment, then turn counts into footage, boxes, labor and a written proposal. CSLB weights this section at 15%. For worked examples, named traps and a full practice exam at CSLB's weights, see the PrepPass C-7 Low Voltage Systems study guide.
Materials
Match categories end to end; know fiber by jacket color and coax by type.
Fiber colors
Single-mode yellow; OM3 aqua; OM4 violet or aqua; OM5 lime green.
UFC 3-580-01 (2024), Table 2-3Coax
RG-6 drops, RG-11 trunks, no RG-59 on CATV.
UFC 3-580-01 (2024), para. 2-3.5.2PoE
802.3af 15.4 W; 802.3at 30 W; 802.3bt 60 W and 90 W, at the switch port.
UFC 3-580-01 (2024), Table 2-8; IEEE 802.3 liaison on P802.3bt (May 2017)Estimating and proposals
Add slack, round to whole boxes, price with margin, and write a specific contract.
Slack
10 feet in the room and 12 inches above the ceiling per cable.
UFGS 27 10 00 (2025), para. 3.4.2Down payment
Home improvement: no more than $1,000 or 10 percent, whichever is less.
CSLB home improvement contract guideChanges
Price changes by written change order.
CSLB home improvement contract guide