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Calculator: size cables for ampacity and drop budget

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recommendedCrossSection now satisfies two criteria and takes whichever
demands more copper: the voltage-drop budget, and an ampacity at least
as high as the fuse protecting the circuit (ABYC E-11: the OCP rating
must not exceed the conductor's ampacity). Ampacity comes from ABYC
E-11 Table 6A for AWG and ISO 13297 Table A1 for mm², both 105 °C.

Before this, a 40 A load over 0.5 m was sized 1.5 mm² / AWG 16 next to
a 50 A fuse: a cable the fuse can never protect. Long runs stay
voltage-drop driven and unchanged.

The drop budget is now stored per system (3 / 5 / 10 %) and editable in
the system editor, with a global default in Settings that the
standalone calculator uses and new systems inherit.

Cross-sections are derived, never entered by the user, so LoadCableSync
re-derives them when a system opens and when its budget changes.
Library loads are computed instead of being stored as a 1.0 mm²
placeholder. LoadConfigurationStatus therefore reports only what the
user can actually fix: missing length or current.

Also removes the dead cable.pro.* strings and folds three copies of the
mm²-to-AWG conversion into ElectricalCalculations.nearestAWG.
This commit is contained in:
Stefan Lange-Hegermann
2026-08-18 10:59:16 +02:00
parent 88e79d79bf
commit 38183f5282
20 changed files with 624 additions and 191 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
Cable/Base.lproj/Localizable.strings
View File

@@ -117,10 +117,6 @@
"bom.quantity.terminal.badge" = "%1$d× · %2$@";
"bom.quantity.cable.badge" = "%1$.1f %2$@ · %3$@";
"bom.quantity.single.badge" = "1× • %@";
"cable.pro.privacy.label" = "Privacy";
"cable.pro.privacy.url" = "https://voltplan.app/privacy";
"cable.pro.terms.label" = "Terms";
"cable.pro.terms.url" = "https://voltplan.app/terms";
"calculator.advanced.duty_cycle.helper" = "Percentage of each active session where the load actually draws power.";
"calculator.advanced.duty_cycle.title" = "Duty Cycle";
"calculator.advanced.section.title" = "Advanced Settings";
@@ -199,7 +195,7 @@
"loads.overview.metric.current" = "Total Current";
"loads.overview.metric.power" = "Total Power";
"loads.overview.status.missing_details.banner" = "Finish configuring your loads";
"loads.overview.status.missing_details.message" = "Enter cable length and wire size for %d %@ to see accurate recommendations.";
"loads.overview.status.missing_details.message" = "Enter cable length and current draw for %d %@ so Cable can size the wiring.";
"loads.overview.status.missing_details.plural" = "loads";
"loads.overview.status.missing_details.singular" = "load";
"loads.overview.status.missing_details.title" = "Missing load details";
@@ -289,47 +285,7 @@
"settings.pro.manage.url" = "https://apps.apple.com/account/subscriptions";
"settings.pro.day.one" = "%@ day";
"settings.pro.day.other" = "%@ days";
"cable.pro.terms.label" = "Terms";
"cable.pro.privacy.label" = "Privacy";
"cable.pro.terms.url" = "https://voltplan.app/terms";
"cable.pro.privacy.url" = "https://voltplan.app/privacy";
"cable.pro.paywall.title" = "Cable PRO";
"cable.pro.paywall.subtitle" = "Cable PRO enables more configuration options for loads, batteries and chargers.";
"cable.pro.feature.dutyCycle" = "Duty-cycle aware cable calculators";
"cable.pro.feature.batteryCapacity" = "Configure usable battery capacity";
"cable.pro.feature.usageBased" = "Usage based calculations";
"cable.pro.button.unlock" = "Unlock Now";
"cable.pro.button.freeTrial" = "Start Free Trial";
"cable.pro.button.unlocked" = "Unlocked";
"cable.pro.restore.button" = "Restore Purchases";
"cable.pro.alert.success.title" = "Cable PRO Unlocked";
"cable.pro.alert.success.body" = "Thanks for supporting Cable PRO!";
"cable.pro.alert.pending.title" = "Purchase Pending";
"cable.pro.alert.pending.body" = "Your purchase is awaiting approval.";
"cable.pro.alert.restored.title" = "Purchases Restored";
"cable.pro.alert.restored.body" = "Your purchases are available again.";
"cable.pro.alert.error.title" = "Purchase Failed";
"cable.pro.alert.error.generic" = "Something went wrong. Please try again.";
"generic.ok" = "OK";
"cable.pro.trial.badge" = "Includes a %@ free trial";
"cable.pro.subscription.renews" = "Renews %@.";
"cable.pro.subscription.trialThenRenews" = "Free trial, then renews %@.";
"cable.pro.duration.day.singular" = "every day";
"cable.pro.duration.day.plural" = "every %@ days";
"cable.pro.duration.week.singular" = "every week";
"cable.pro.duration.week.plural" = "every %@ weeks";
"cable.pro.duration.month.singular" = "every month";
"cable.pro.duration.month.plural" = "every %@ months";
"cable.pro.duration.year.singular" = "every year";
"cable.pro.duration.year.plural" = "every %@ years";
"cable.pro.trial.duration.day.singular" = "%@-day";
"cable.pro.trial.duration.day.plural" = "%@-day";
"cable.pro.trial.duration.week.singular" = "%@-week";
"cable.pro.trial.duration.week.plural" = "%@-week";
"cable.pro.trial.duration.month.singular" = "%@-month";
"cable.pro.trial.duration.month.plural" = "%@-month";
"cable.pro.trial.duration.year.singular" = "%@-year";
"cable.pro.trial.duration.year.plural" = "%@-year";
// MARK: - PDF Overview Export
"overview.pdf.loads.section" = "Loads";
@@ -388,3 +344,10 @@
"overview.share.diagram" = "Wiring Diagram";
"overview.share.pdf" = "Full Report (PDF)";
"overview.share.diagram.error" = "Could not generate diagram. Check your internet connection.";
"editor.system.voltage_drop.label" = "Voltage drop budget";
"editor.system.voltage_drop.hint.critical" = "3 % — for critical circuits like navigation, bilge pumps and electronics.";
"editor.system.voltage_drop.hint.standard" = "5 % — balanced default for mixed installations.";
"editor.system.voltage_drop.hint.noncritical" = "10 % — for non-critical loads such as cabin lighting.";
"settings.voltage_drop.label" = "Voltage drop budget";
"settings.voltage_drop.footnote" = "Used by the calculator and for new systems. Existing systems keep their own budget.";