OhmBase
Electrician Field Tools
OhmBase
Welcome
IBEW LOCAL 3 · JOURNEYMAN
0 jobs
○ Off the clock
Tap to clock in
Active job
None set
Today
0.0 hrs
Last note
No notes yet
incl. OT
Quick tools
Edit
All tools →
Active jobs
See all →
🔌 Clean slate.
Add your first job in the Jobs tab to get rolling.
Jobs
0 active
All
Commercial
Residential
Industrial
Wrapped
Hours & pay
IBEW Local 3 · Journeyman wireman
0.0
Total hours
Straight time
$0
Gross pay est.
incl. OT
0.0
Regular
0.0
Overtime
Week at a glance
Regular
Overtime
This week
This month
YTD
Log
Daily breakdown
Not clocked in
Tap clock in to start tracking
Log hours manually
Date
Hours
Clock in
Clock out
Today's entries
IBEW Local 3 rates
Paycheck check
Pick the pay period, then compare against your stub's gross.
From
To
Gross pay on your stub ($)
Travel & per diem
Date
Job (optional)
Miles
Rate $/mile (yours)
Per diem ($)
Lodging ($)
Mileage rate is whatever you set — OhmBase never assumes an IRS rate.
This week
Profile
Your info, certifications & settings
Edit profile
Full name
Affiliation
Settings
Tap any toggle to enable or disable features. Changes take effect immediately.
Clock-in features
Show clock in/out on Hours & Home
Cert expiry reminders
60 days before expiry
Show benefit contributions
In pay estimates
Haptic feedback
Short vibration on clock in/out & saves
Larger touch targets
Bigger buttons & controls — gloved hands
Hours & pay features
Off hides the Hours tab & pay displays — your data is kept
Week starts on
First day of your work week
Sun
Mon
Code & state
Your state (optional)
Overtime rules
Applies to weekly hours, timesheets and the paycheck check. Double time pays 2× base rate.
Appearance
Dark
Light
Outdoor
Sun
Certifications
+ Add
Business info
Used on customer-facing proposals and bids.
Upload logo
Business name
Phone
Email
License #
Address
Tagline (optional)
About & legal
OhmBase is a reference & estimating tool, not engineering advice. Tables are based on NEC 2023 — always verify against the code edition adopted by your AHJ. You are responsible for the accuracy of your work.
Full disclaimerView
Supportsupport@ohmbase.app
OhmBase counts anonymous usage (which tools get opened, how often) via GoatCounter to decide what to build next — no accounts, no personal identifiers, and your data never leaves the phone.
Data corrections
⚠ Motor & NEC table corrections
Errors were found in NEC data used by earlier versions and corrected against the 2023 NEC:
Single-phase motor FLA (115 V / 230 V) was understated in v4.2.5 and earlier — a 1/2 HP 115 V motor read 4.4 A instead of 9.8 A (Table 430.248).
Motor minimum wire size was oversized by 2–4 sizes (Table 310.16, 75 °C).
Conduit and wire fill areas (Ch. 9 Tables 4 & 5) had incorrect IMC, rigid and PVC values.
Please re-check any motor circuits or conduit fills sized with an earlier version of OhmBase.
The understated motor FLA is the safety-relevant one — undersized conductors or overcurrent protection. Three-phase motor data was not affected.
OHMBASE · v4.5.4
Tools
16 calculators & references
Saved results
Calculators
Voltage drop
NEC 210.19 · 3% rec / 5% max
Ohm's law
V = IR · P = VI
Load calc
NEC 220 · residential
Wire ampacity
NEC 310.15 · THHN 75°C
Box fill
NEC 314.16 · cubic inches
M
Motor wiring
NEC 430 · FLA tables
Conduit bending
Stub · offset · saddle
Phase tool
Circuit · wire color
Wire pull
Tension · jam ratio · bends
Raceway sizing
Mixed fill · NEC Ch.9
Panel schedule
Build & label panel
$
Job cost
NECA MLU · classification rates
References
NEC quick reference
Common articles & key numbers — not a full code lookup
Grounding & bonding
NEC 250 — EGC, GEC, bonding jumpers, electrodes
Troubleshooting guide
Field fault trees — GFCI, breakers, motors, wiring
Job tools
Material estimator
Parts list builder — preset + custom items · copy as text
Bid builder
Labor + materials + overhead + profit → contractor bid summary
Invoices
Bid → invoice → paid · track payments · branded PDF
Customers
Contacts · linked jobs & invoices · billed / paid
Van stock
Stock lists · par levels · one-tap restock list