grounding
One-Hole vs Two-Hole Compression Lugs and NEMA Hole Spacing
One hole or two is decided by the pad, not the conductor. Where each is used, the NEMA hole spacings that matter (1 inch on 3/8 bolts, 1-3/4 inch on 1/2 bolts), ground bar patterns, and the mistakes that get lugs rejected.
Read more
Compression Lugs and Grounding Connectors for Data Centers: Where They Land and What to Spec
Where compression lugs and grounding connectors land in a data center, from the ground ring and MGB to UPS battery strings, busway taps and generator paralleling gear, and why data center electrical contractors specify Conversions Tech as the stocked second source.
Read more
How Many Ground Rods Do You Need? NEC 250.53 Two-Rod Rule, the 25 Ohm Test, Soil Resistivity and Rod Spacing, Length and Diameter
When one rod is enough, when the NEC requires two, why almost every inspector now requires two without a test, how soil resistivity sets electrode resistance, and how rod length, diameter and spacing change the result, with the formula and a table.
Read more
Neutral Bar and Ground Bar Sizing: Positions, Wire Range and Bonding by Service Size, for Panelboards, Subpanels and Transfer Switches
How to pick an add-on neutral or ground bar: count the terminations, match the wire range to the largest conductor, choose the main lug size from the service, and know when the bar must be bonded to the enclosure and when it must be isolated.
Read more
Split Bolt vs C-Tap vs Insulated Multi-Tap (Polaris): Which Tap Connector to Use by Conductor, Location and Code
The three ways to tap or splice a feeder without a box full of lugs: split bolts, compression C-taps and insulated multi-taps. What each is listed for, where the NEC allows it, insulation requirements, and a selection table by job.
Read more
Ufer Ground (Concrete-Encased Electrode): NEC 250.52(A)(3) Requirements, Rebar Clamp Selection, Conductor Size and Inspection
What a concrete-encased electrode is, when NEC 250.50 makes it mandatory, the 20 ft rebar or 4 AWG copper requirement, which clamp is listed for the connection, how big the grounding electrode conductor has to be, and what the inspector checks before the pour.
Read more
UL 486A, 486B, 486C, 467 and 6703 Explained: Which Listing an Electrical Connector Needs, and What Each One Actually Tests
A plain-language reference to the UL standards on connector markings: what each covers, what the test proves, and which one the NEC requires for lugs, splices, grounding connectors and PV connectors.
Read more
NEC 2026 Grounding and Bonding Changes: What Electricians Need to Order Differently
The 2026 NEC cycle tightens irreversible compression requirements, GEC sizing tables and bonding of metal water piping. Here is what changed in Article 250 and which parts to stock before your AHJ adopts it.
Read more
Grounding Accessories and the NEC: Bushings, Pigtails, Bonding Jumpers, and Rebar Clamps
Insulated grounding bushings, pigtails and grounding screws, water heater bonding kits, braided jumpers, and rebar clamps — what each one does and the NEC section (250.97, 250.146, 250.148, 250.8, 250.104, 250.98, 250.52) that requires it.
Read more
How to Crimp Irreversible Compression Grounding Connectors (C-Taps, Figure 6, Figure 8)
Step-by-step field procedure for crimping UL 467 irreversible compression grounding connectors: tool and die selection, conductor prep, crimp sequence, and the inspection marks that prove the joint.
Read more
Irreversible Compression Grounding Connectors: Where, How, and Why to Use Them
A working guide to irreversible compression grounding: what the NEC and UL 467 actually require, where compression beats exothermic welding and mechanical clamps, and how C-taps, Figure 6, and Figure 8 connectors are specified.
Read more
How to Choose the Right Grounding Connector: A Contractor's Decision Guide (2026)
Ground rod clamps vs. compression connectors vs. split bolts — when to use each one, with real-world examples and ...
Read more
