How to:

Voltage drop:

- https://www.mikeholt.com/technnical-voltage-drop-calculations-part-one.php

- http://www.mcgowanelectric.com/etools/voltage-drop-calculator

- https://www.calculator.net/voltage-drop-calculator.html

all types of calculations: https://www.engineeringtoolbox.com/awg-wire-gauge-circular-mils-d_819.html

Adapters(mud rings)

Use appropriate adapters so the set back is no more than 1/4" of the finish surface

If the installation ends up deeper than allowed 1/4" set back use grounding tail and "switch box extenders" http://www.aifittings.com/catalog/miscellaneous/box-extenders/

Radiant floor heat
All certified thermostats have GFCI protection no need for GFCI outlet or breaker

General purpose outlets

Must be on AFCI

Where you stand must be within 6 linear feet on the wall or floor near wall

Any wall space more than 24"

No more than 18" AFF

Must be TR type for residential

In baseboards, counter tops use grounding tail with "switch box extenders" http://www.aifittings.com/catalog/miscellaneous/box-extenders/

AC outlets

Each AC outlet must have dedicated set of wires from the panel, no sharing

Kitchen

Minimum 2 dedicated circuit over the counter top. I expect at least 4 circuits above the counter top for 2 bedrom and larger residences

All appliances on dedicated lines

All apliances must have means of disconnect(outlet, service switch, etc)

Island or peninsula over 6' long must have outlet on top or near top.

If island or peninsula longer than 6' must also have general purpose outlet

All outlets within 6' of the sink must be GFCI protected

Outlets or plugmold maximum 20" above the counter top

Any countertop space longer than 12" needs outlet

Panels

All breakers must be same type as the panel or approved for that panel

Panel height maximum 6'7" tot he top breaker. Same height goes for fused or breaker disconnects or service switches

All wires landed with twin connectors must be identified and grouped, best with zip ties. NEC 200.4(B)

Bathrooms

Outlets on dedicated circuit

Lights can be connected to other lighting circuit or dedicated circuit for lights only

GFCI outlet must be within 3' of the basin outside edge. If two sinks where faucets are within  1 gfci between these two sinks is sufficiant

No pendants closer than 3 feet to the shower or bath tub