Resources
Worth reading before you write the spec.
Practical guides for the people planning low voltage work in California: how to pick a contractor, what the standards actually require, what things cost, and which rules apply to your building. No jargon for its own sake.
No obligation, and we will say so if the work is outside our license.
Guides
Planning, specification and installation guides
- Guide · 8 min read
Cat6 vs Cat6A: How to Specify Cabling for a Commercial Building
Cat6 vs Cat6A for commercial buildings: bandwidth, 10GBASE-T reach, pathway fill, PoE heat, relative cost, Wi-Fi 6E and 7 uplinks, and a decision framework by building type
Read the guide - Guide · 9 min read
Cloud vs On-Premise Access Control: Choosing an Architecture for a Commercial Building
Cloud-managed, on-premise and hybrid access control compared: platforms commonly specified, licensing, offline behavior, credentials, integration, IT security and cost
Read the guide - Guide · 10 min read
ERRCS vs Cellular DAS: What Is the Difference
ERRCS and cellular DAS compared: what each system is for, who requires it, which spectrum and licensee, what consent and listing apply, and why the two are not interchangeable
Read the guide - Guide · 9 min read
Division 27 and Division 28 Specification Checklist for Commercial Low Voltage Systems
What a commercial Division 27 and Division 28 specification should contain, section by section, and the gaps in cabling, security and AV specs that turn into change orders
Read the guide - Guide · 10 min read
Fiber Trench vs Wireless Bridge: Connecting Two Buildings
Four ways to connect two buildings on one network compared: trenched fiber, aerial fiber, a wireless bridge and a carrier circuit, with cost drivers, lead time and permitting
Read the guide - Guide · 10 min read
How Long to Keep Security Camera Footage
Video retention as a policy decision and a storage calculation: what sets the number, California specifics, storage sizing tables, and why real retention drifts
Read the guide - Guide · 10 min read
How Many Security Cameras Does a Building Need?
A counting method for commercial camera systems: purpose per camera, pixels on target, standard positions, how building type changes the count, and a worked example
Read the guide - Guide · 9 min read
How to Choose a Low Voltage Contractor in California
How to choose a low voltage contractor in California: the license to verify, the insurance to ask for, the questions that separate installers from brokers, and the red flags
Read the guide - Guide · 9 min read
Low Voltage in Occupied Buildings: Phasing an Affordable or Senior Housing Rehab
How to phase Wi-Fi, CATV, camera, access control and nurse call work in an occupied affordable or senior housing rehab: notice, unit access, cutover, testing and records
Read the guide - Guide · 10 min read
Low Voltage Closeout Documentation Checklist
Everything a complete low voltage closeout package contains, who uses each document and when, the two defects that make a package worthless, and the spec language that gets it
Read the guide - Guide · 9 min read
MDF and IDF Buildout: Rack, Ground, Cool, Label and Certify a Network Room
How to build out an MDF or IDF to TIA-569, TIA-607 and TIA-606: room sizing, racks, ladder rack, power and UPS, cooling, bonding, labeling, certification and as-builts
Read the guide - Guide · 9 min read
Nurse Call Systems for California Senior Housing: A Planning Guide
Nurse call system planning for California senior housing and assisted living: system types, wired vs wireless, UL 1069 and UL 2560, owner requirements, occupied retrofits
Read the guide - Guide · 9 min read
NVR vs Cloud vs Edge: Where Recorded Video Should Live
On-premise NVR, cloud and edge video recording compared for California commercial buildings: bandwidth math, storage sizing, outage behavior and five year cost
Read the guide - Guide · 9 min read
Owner Furnished vs Contractor Furnished Equipment on a Low Voltage Package
OFCI or CFCI on a Division 27 and 28 package: what each arrangement transfers, the schedule and warranty seams it creates, and the clause language that makes OFCI work
Read the guide - Guide · 10 min read
PoE Budget Planning for Cameras, Access Points and Phones
Why PoE switches get undersized: per port power versus total switch budget, the four 802.3 types, a worked budget for a floor IDF, bundle heat, UPS sizing and growth margin
Read the guide - Guide · 10 min read
Single Mode vs Multimode Fiber: Which One to Specify
Single mode OS2 vs multimode OM3, OM4 and OM5 for commercial backbones: reach, optics cost, strand count, a worked loss budget, termination methods and testing tiers
Read the guide - Guide · 10 min read
Prox Cards vs Smart Cards vs Mobile Credentials
Access credentials compared for California commercial buildings: 125 kHz prox, 13.56 MHz smart cards and mobile, with a phased migration sequence for occupied sites
Read the guide - Guide · 9 min read
Structured Cabling Installation in California: A Commercial Project Guide
How commercial structured cabling installation works in California: TIA standards, pathways, rough-in timing, Cat6 vs Cat6A, certification, labeling, permits and C-7 licensing
Read the guide - Guide · 10 min read
What to Ask a Low Voltage Contractor Before You Sign
The scope and contract questions to ask a low voltage contractor after you have picked one: trade boundaries, labor, testing, schedule, change orders and warranty
Read the guide - Guide · 10 min read
Wi-Fi 6 vs 6E vs 7: What Changes for a Commercial Building
Wi-Fi 6, 6E and 7 compared for commercial buildings: what each generation changed, how 6 GHz behaves, the PoE and uplink each one assumes, and how to decide by building type
Read the guide
Cost
Planning ranges, not quotes
California commercial planning ranges as of 2026, with the variables that move them. A real number comes from plans.
- Cost · 8 min read
Access Control Installation Cost: Per-Door and Per-Site Planning Ranges
Access control installation cost for California commercial buildings in 2026: per-door and per-site planning ranges, what a door includes, cloud vs on-premise, gates
Read the guide - Cost · 9 min read
Business Phone System Cost: Hosted VoIP vs On-Premise Per User
Business phone system cost in California for 2026: hosted VoIP and on-premise planning ranges per user and per site, handsets, network work, E911, and a worked example
Read the guide - Cost · 9 min read
Commercial Wi-Fi Installation Cost: Per-AP and Per-Building Ranges
Commercial wifi installation cost in California for 2026: per access point and per building planning ranges, survey and licensing cost, and a worked example with assumptions
Read the guide - Cost · 10 min read
Fiber Optic Installation Cost: Per Strand, Per Link and Per Route
Fiber optic installation cost in California for 2026: per component, per link and per route planning ranges, why the trench dominates outside plant, and a worked example
Read the guide - Cost · 9 min read
Security Camera Installation Cost: Per-Camera and Per-Building Ranges
Commercial security camera installation cost in California for 2026: per camera and per building planning ranges, recording platform cost over five years, worked example
Read the guide - Cost · 8 min read
Structured Cabling Cost in California: 2026 Planning Ranges per Drop
Cat6 installation cost and Cat6A planning ranges for California commercial buildings in 2026, per drop and per building, the variables that move price, and a worked example
Read the guide
Compliance
Licenses and federal equipment rules, explained plainly
- Compliance · 10 min read
ADA Reach Ranges for Card Readers, Intercoms and Call Stations
Reach ranges, clear floor space, operating force and protruding object limits for the low voltage devices a contractor mounts, under the 2010 ADA Standards and CBC Chapter 11B
Read the guide - Compliance · 10 min read
BSIS Alarm Company Operator License vs a C-7: What Each Covers
The line between a CSLB C-7 low voltage contractor and a BSIS Alarm Company Operator, why there is no contractor exemption, and how to bid a mixed alarm scope
Read the guide - Compliance · 10 min read
California Cannabis Video Surveillance Requirements Under 4 CCR 15044
The DCC video surveillance rule for licensed cannabis premises: resolution, frame rate, coverage, 90 day retention, failure notification, and what each one costs in design
Read the guide - Compliance · 10 min read
California ALPR Law for Parking Operators and Property Owners
Civil Code 1798.90.5 to 1798.90.55 explained: who becomes the ALPR operator, the required usage and privacy policy, access logging, retention and damages exposure
Read the guide - Compliance · 9 min read
The California C-7 Low Voltage License Explained: Scope, Exclusions, and How to Verify One
What the California C-7 low voltage contractor license covers and excludes, how it differs from C-10, C-28 and a BSIS alarm license, and how to verify a bidder at CSLB
Read the guide - Compliance · 9 min read
California Fire Code Section 510: When a Building Needs Public Safety Radio Coverage
What California Fire Code Section 510 requires for emergency responder radio coverage, why the thresholds are set locally rather than statewide, and how an ERRCS gets approved
Read the guide - Compliance · 10 min read
DSA and HCAI Review: What They Change for a Low Voltage Subcontractor
How Division of the State Architect and HCAI plan review change a low voltage scope on California school and healthcare projects, and what a subcontractor does differently
Read the guide - Compliance · 8 min read
NDAA Section 889 Compliant Cameras: A California Buyer's Guide
Who NDAA Section 889 and 2 CFR 200.216 apply to, which camera makers are covered, the white-label OEM problem, and how to specify and document NDAA compliant cameras
Read the guide - Compliance · 9 min read
Plenum vs Riser Cable: California Listing Rules That Get a Job Red Tagged
Which cable listing belongs in which space under the California Electrical Code: plenum, riser and general purpose for copper, fiber and coax, and who decides
Read the guide - Compliance · 10 min read
Prevailing Wage and DIR Registration for Low Voltage Work in California
When prevailing wage and DIR registration apply to a California low voltage subcontract, which classification governs, and what a GC should collect before award
Read the guide
Tools
Two calculators for early budgeting
- Tool
Cable drop estimator
A rough drop count and planning range from square footage, workstation density, cameras, access points and building type.
Open the estimator - Tool
Camera coverage calculator
Pixels per foot at a target distance for a given sensor and lens, checked against the detection, recognition and identification thresholds.
Open the calculator
Have a project coming up? Let’s talk.
Send over a drawing set or just describe what you need. We will tell you what we can take on, what to plan for, and how soon we can be there.